CRC32，适用于internet,文件等的校验，可靠程度比CRC32高，但运算要比CRC16复杂，需要的占用的代码空间也大一点-CRC applied to internet, checking the documents, reliable than CRC, but the operation than CYXLIC REDUNDANCY complex, requiring the occupants of the large code space 1:00
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001728s ]
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:0.107740s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001350s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001691s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001437s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006710s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001861s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007456s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.022854s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001446s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 317371 [ RunTime:0.013331s ]
