实验目的和要求
1．掌握查看、重命名及删除用户定义的数据类型的方法。
2．掌握向表中添加、删除及修改数据的方法。
3。综合实验结果
-Experimental purposes and requirements of one. Master view, rename and delete user-defined data type method. 2. Master to the table to add, delete and modify data. 3. Comprehensive experimental results
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002055s ]
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:0.088899s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002454s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002040s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002194s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003841s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002030s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003238s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015526s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002538s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 226350 [ RunTime:0.001260s ]
