为了得到最大的性能，一般数据库都有并发机制，不过带来的问题就是数据访问的冲突。为了解决这个问题，大多数数据库用的方法就是数据的锁定.-In order to get the maximum performance, a general mechanism for the database have complicated, but the problem is caused by data access conflicts. To solve this problem, the majority of the database is used to lock data.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.006688s ]
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:0.090761s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001537s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001340s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001048s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003634s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000978s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003824s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.018267s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001582s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 152515 [ RunTime:0.019739s ]
