求集合的各元素的重数，也就是重复次数，和集合的众数，也就是重复次数最多的元素-Seeking re-set the number of each element, that is, repetition, and the collection mode, that is, the highest number of repeated elements
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.013167s ]
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:0.068721s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001044s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001173s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001171s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003011s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000866s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003722s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016177s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001711s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 201889 [ RunTime:0.012307s ]
