数据与计算机通信(第七版)答案。英文版的，全部答案都有。供参考和学习-Data and computer communications (seventh edition) answers. English, all have the answer. For reference and learning
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002736s ]
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:0.086552s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001906s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002073s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002102s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003636s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002107s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003360s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014525s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002555s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 237127 [ RunTime:0.001166s ]
