java 实现的序列号生成器，类似数据库的Sequence，为实现跨数据库而设计。-java achieve the serial number generator, similar to the Sequence Database. To achieve cross-database design.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001008s ]
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:0.074751s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000869s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001243s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001009s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003327s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000876s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003687s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.023670s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001247s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 47946 [ RunTime:0.019804s ]
