Keil C51 上51系列单片机优化的CRC－8 算法。可以自己改其他算式的，包含字节查表，半字节查表，bit计算。很难得的哦。-Keil C51 on the 51 computers optimized CRC-8 algorithm. Other formula can do it ourselves, and look-up table contains the byte, half-byte look-up table, bit computing. Hard to come by Oh.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.003655s ]
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:0.103748s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000987s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001229s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000942s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003201s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000903s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003826s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017810s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001225s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 113716 [ RunTime:0.016091s ]
