针对每一个测试的输入，输出化简后不包含多余括号的表达式。注意化简只是去掉多余的括号，不是进行数学变换。-a test for each of the input and output of SR does not contain redundant after the brackets expression. Simplification is to remove redundant brackets, not mathematical transform.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001392s ]
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:0.094506s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001298s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001991s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001264s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003701s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001109s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003323s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015094s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001445s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 141667 [ RunTime:0.001228s ]
