成绩管理系统可以对学生、课程、选课、成绩的录入、班级、用户的信息进行管理等，
环境：java+Jbuilder+jdk1.5+sql200+jdbc2000 -Performance management system can be for students, courses, classes, results entry, class, the user
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001334s ]
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:0.074417s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001123s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001091s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001019s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003067s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000859s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003939s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014588s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001185s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 44173 [ RunTime:0.017872s ]
