逻辑运算类：支持与或非逻辑运算，支持括弧 ( ) 改变运算先后。-Logic operations categories: support and non-logical operations, support brackets () to change the computing successively.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000950s ]
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:0.091306s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001007s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001156s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001032s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003301s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000860s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003953s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015069s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001118s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 182002 [ RunTime:0.023143s ]
