本系统可以被管理员、图书馆工作人员、和读者三种身份的人员通过帐号和密码以不同身份登陆到本系统，并实现各自的功能操作。-Intruction: Administrator, worker in library and readers can log in this system according to the user name and password respectly,then do some operations granted.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002900s ]
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:0.099833s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002730s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001890s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002118s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003597s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002115s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003377s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016092s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002185s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 302243 [ RunTime:0.001164s ]
