完全图解数据库原理及应用数据库系统工程师图解sql语言轻松入门sql即学即用- 电子书下载

基本文件流程错误 SQL 调试

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[ LANG ] /www/wwwroot/manboo.info/thinkphp/lang/zh-cn.php
[ ROUTE ] array ( 'rule' => 'book/<id>', 'route' => 'index/Search/resources', 'option' => array ( 'merge_rule_regex' => false, ), 'var' => array ( 'id' => '51054', ), )
[ HEADER ] array ( 'x-forwarded-proto' => 'https', 'cf-visitor' => '{"scheme":"https"}', 'cf-ipcountry' => 'US', 'cf-connecting-ip' => '216.73.216.78', 'cdn-loop' => 'cloudflare; loops=1', 'user-agent' => 'Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])', 'accept-encoding' => 'gzip, br', 'accept' => '*/*', 'cf-ray' => 'a0dc8cd5586ae88e-CMH', 'x-forwarded-for' => '216.73.216.78', 'host' => 'manboo.info', 'content-length' => '', 'content-type' => '', )
[ PARAM ] array ( 'id' => '51054', )
[ DB ] INIT mysql
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[ VIEW ] /www/wwwroot/manboo.info/application/index/view/search/resource.html [ array ( 0 => 'site_title', 1 => 'site_keywords', 2 => 'site_description', 3 => 'icp_number', 4 => 'contact_info', 5 => 'email_address', 6 => 'wechat_qrcode_url', 7 => 'site_logo_url', 8 => 'footer_copyright', 9 => 'maintenance_mode', 10 => 'hot_keywords', 11 => 'cateGroup', 12 => 'data', 13 => 'relatedResources', 14 => 'relatedResources_cates', 15 => 'recentResources', ) ]

[ DB ] CONNECT:[ UseTime:0.000985s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SHOW COLUMNS FROM `config` [ RunTime:0.000963s ]
[ SQL ] SELECT `value` FROM `config` WHERE `name` = 'maintenance_mode' LIMIT 1 [ RunTime:0.000341s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'config', 'partitions' => NULL, 'type' => 'const', 'possible_keys' => 'name', 'key' => 'name', 'key_len' => '1022', 'ref' => 'const', 'rows' => 1, 'filtered' => 100.0, 'extra' => NULL, ) ]
[ DB ] CONNECT:[ UseTime:0.000422s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SHOW COLUMNS FROM `resources` [ RunTime:0.000914s ]
[ SQL ] SELECT * FROM `resources` WHERE `id` = 51054 LIMIT 1 [ RunTime:0.000538s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'const', 'possible_keys' => 'PRIMARY,id_2,id', 'key' => 'PRIMARY', 'key_len' => '8', 'ref' => 'const', 'rows' => 1, 'filtered' => 100.0, 'extra' => NULL, ) ]
[ DB ] CONNECT:[ UseTime:0.000416s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT * FROM `resources` WHERE `jd_skuName` LIKE '%%' AND `id` <> 51054 LIMIT 10 [ RunTime:0.001514s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => 'PRIMARY,id_2,id', 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 49954, 'filtered' => 11.110000610351562, 'extra' => 'Using where', ) ]
[ DB ] CONNECT:[ UseTime:0.000367s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT * FROM `resources` WHERE `jd_cate3` = '数据库' AND `id` <> 51054 LIMIT 10 [ RunTime:0.000757s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'PRIMARY,id_2,id,jd_cate3', 'key' => 'jd_cate3', 'key_len' => '403', 'ref' => 'const', 'rows' => 2079, 'filtered' => 100.0, 'extra' => 'Using where', ) ]
[ DB ] CONNECT:[ UseTime:0.003088s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] UPDATE `resources` SET `views` = `views` + 1 WHERE `id` = 51054 [ RunTime:0.000437s ]
[ DB ] CONNECT:[ UseTime:0.000297s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SHOW COLUMNS FROM `keywords` [ RunTime:0.000621s ]
[ SQL ] SELECT * FROM `keywords` WHERE `is_audit` = 1 ORDER BY `search_count` DESC LIMIT 30 [ RunTime:0.000582s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'keywords', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 231, 'filtered' => 10.0, 'extra' => 'Using where; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000471s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT * FROM `resources` WHERE `id` <> 51054 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000636s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'index', 'possible_keys' => 'PRIMARY,id_2,id', 'key' => 'PRIMARY', 'key_len' => '8', 'ref' => NULL, 'rows' => 10, 'filtered' => 100.0, 'extra' => 'Using where', ) ]
[ DB ] CONNECT:[ UseTime:0.000428s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate2` FROM `resources` WHERE ( jd_cate2 <> "" ) ORDER BY `jd_cate2` ASC [ RunTime:0.002426s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'range', 'possible_keys' => 'jd_cate2', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => NULL, 'rows' => 56, 'filtered' => 100.0, 'extra' => 'Using where; Using index for group-by', ) ]
[ DB ] CONNECT:[ UseTime:0.000389s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '中小学教辅' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.003761s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 603, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000316s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '书法' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000671s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 6, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000416s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '二手书' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000732s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 27, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000303s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '传记' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000544s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 2, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000379s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '养生/保健' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000656s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 15, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000449s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '动漫' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.001312s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 99, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000400s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '励志与成功' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.056000s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 10441, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000670s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '医学' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000614s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 12, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000347s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '历史' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000549s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 28, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000295s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '哲学' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000667s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 18, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000353s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '国学/古籍' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000437s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 5, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000302s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '外语学习' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000973s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 105, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000338s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '大中专教材教辅' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.001237s ]
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[ DB ] CONNECT:[ UseTime:0.000418s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '套装书' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000517s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 6, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.001251s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '婚恋与两性' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000413s ]
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[ DB ] CONNECT:[ UseTime:0.000300s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '字典词典/工具书' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000544s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 3, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000375s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '学习用品' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000661s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 17, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000296s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '学历考试辅导' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000589s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 20, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000424s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '家教' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.008489s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 1578, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000622s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '小说' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000743s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 45, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000280s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '工业技术' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000690s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 13, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000286s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '建筑' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000458s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 1, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000462s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '心理学' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.001331s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 205, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000371s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '政治/军事' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000792s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 24, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000335s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '文创用品' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000392s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 1, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000336s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '文化' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000461s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 4, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000302s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '文化用品' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000514s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 5, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000365s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '文学' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000757s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 32, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000383s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '旅游/地图' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000563s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 15, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000295s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '日文图书' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000518s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 1, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000373s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '早教/智能玩具' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000519s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 1, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000288s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '本册纸签' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.001125s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 157, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000269s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '杂志/期刊' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000707s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 35, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000387s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '棋牌麻将' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000493s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 5, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000325s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '法律' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000542s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 7, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000291s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '港台图书' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000553s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 9, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000332s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '电子与通信' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000571s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 6, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000316s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '益智玩具' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000717s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 32, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000376s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '社会科学' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.001082s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 54, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000310s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '科学与自然' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000647s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 14, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000381s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '科普读物' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.001253s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 67, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000373s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '童书' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.055498s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 12735, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.003311s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '管理' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.001168s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 91, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.002672s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '经济' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.001012s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 97, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.004150s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '考试' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.024894s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 6039, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000590s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '艺术' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000659s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 1, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000411s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '计算机' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000730s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 1, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000324s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '计算机与互联网' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.081906s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 16366, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000432s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '软件' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000699s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 1, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000422s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '运动/健身' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000758s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 2, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000388s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '进口原版' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000772s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 10, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000323s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '金融与投资' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.001658s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 671, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000431s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '青少年素质培养' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000465s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 9, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000375s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '青春文学' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000513s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 95, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]
[ DB ] CONNECT:[ UseTime:0.000298s ] mysql:host=127.0.0.1;port=3306;dbname=manboo_infoac;charset=utf8mb4
[ SQL ] SELECT DISTINCT `jd_cate3` FROM `resources` WHERE `jd_cate2` = '音乐' AND ( jd_cate3 <> "" ) ORDER BY `jd_cate3` ASC [ RunTime:0.000480s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'resources', 'partitions' => NULL, 'type' => 'ref', 'possible_keys' => 'jd_cate2,jd_cate3', 'key' => 'jd_cate2', 'key_len' => '403', 'ref' => 'const', 'rows' => 5, 'filtered' => 100.0, 'extra' => 'Using index condition; Using where; Using temporary; Using filesort', ) ]

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完全图解数据库原理及应用数据库系统工程师图解sql语言轻松入门sql即学即用