一个关于数据库课程设计报告的实例，是学校选课系统，包括需求分析，数据流图，数据字典等。-a course on database design report examples of school classes, including needs analysis, data flow diagram, data dictionaries.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001528s ]
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:0.076396s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001300s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001171s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001078s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003069s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001088s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003950s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015716s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001140s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 301375 [ RunTime:0.013964s ]
