操作系统教程(第四版)答案(孙钟秀主编)。全部答案都有。方便参考和学习。-Operating System Tutorial (fourth edition) answers (Zhongxiu Sun editor-in-chief). Have all the answers. Ease of reference and learning.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002971s ]
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:0.095404s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002152s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002060s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002037s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003638s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001874s ]
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:0.015137s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002138s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 237009 [ RunTime:0.001219s ]
