能对数据库进行维护，包括内容和结构 但是数据库中的表要求有主键 且是自动增长字段-Able to carry out maintenance on the database, including the content and structure of the table but the database requires the primary key and is auto-growth fields
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DBMaintainDll bin obj Data Structure AssemblyInfo.cs DBMaintainDll.csproj DBMaintainDll.csproj.user DBMaintainFrm.cs DBMaintainFrm.resx AlterTabel.cs AlterTabel.resx CreateTable.cs CreateTable.resx
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001304s ]
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:0.087461s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001539s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002043s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001285s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003600s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001059s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003177s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016401s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001476s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 203817 [ RunTime:0.001217s ]
