选课管理数据库,以SQL为实际的数据平台，灵活建立数据库、数据库表、实现对表的各种查询等。-Course management database to SQL data for the actual platform, the establishment of a flexible database table to table to achieve the various inquiries.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001986s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.086698s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002320s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001924s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002239s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003678s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001999s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003261s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014713s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002539s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 125305 [ RunTime:0.001200s ]
