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:0.001196s ]
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:0.086144s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001615s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002009s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001167s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003603s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000976s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003219s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014832s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001331s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 301375 [ RunTime:0.001465s ]
