1. 掌握数据库设计和实现的基本方法。
掌握数据库模式设计、分析和实现的方法，理解规范化的作用
-1. Master database design and realization of the basic method. Master database schema design, analysis and implementation methods, understanding the role of standardization
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001425s ]
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:0.133386s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001012s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001112s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000989s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003650s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001239s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003770s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014913s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001152s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 143971 [ RunTime:0.015963s ]
