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:0.001269s ]
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:0.108993s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001319s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001987s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001267s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003767s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001081s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003350s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016382s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001412s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 182002 [ RunTime:0.001619s ]
