最经典的数据库高级教材 数据库概念（第4版）实验 用于数据库学习和实验 强烈推荐-classic database senior materials database concept (Release 4) experimental database for the study and experiment strongly recommended
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001351s ]
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:0.121231s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001517s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001933s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001222s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003620s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001039s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003224s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014846s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001388s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 111931 [ RunTime:0.001313s ]
