许多程序都需要控制仅启动一个实例，方法有很多，这里介绍的就是一个啦，不是利用Mutux，而利用映像的有效的方法，-many procedures need to control only a start examples, there are many ways, presented here is a-- is not used Mutux, and the effective use of mapping methods
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001049s ]
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:0.077457s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001054s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001139s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000997s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003120s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000888s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003670s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017050s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001210s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 314211 [ RunTime:0.017307s ]
