模拟unload命令 写一个程序把学生的数据文件，成绩数据文件，课程数据文件，读出分别写到另外三个不同-simulation unload order to write a procedure, the student data files, data files results, a curriculum document, read out wrote the other three were different
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001368s ]
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:0.067579s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000983s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001112s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001139s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.002968s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000838s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003704s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.013932s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001224s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 67760 [ RunTime:0.171179s ]
