北@大 03级数据库上机实验内容和习题解答,很有代表性的题目,供大家参考-North @ 03 large database content and experimental machine to answer the questions, very representative of topics for your consideration
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001861s ]
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:0.089968s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001292s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001932s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001242s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003633s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001098s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003234s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015869s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001567s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 300889 [ RunTime:0.001490s ]
