可以实现一些简单的学生管理工作，比如增添记录，删除记录，修改记录，以及排序等-Can be achieved with some simple management of the students, such as adding records, delete records, modify records, as well as the ranking
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002084s ]
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:0.090405s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002439s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002139s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002455s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003631s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002131s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003239s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014583s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002313s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 165312 [ RunTime:0.001192s ]
