计算CRC校验和,可以计算modbus规约/CDT规约/DISA规约/DF1规约/DNP规约/1801等规约的校验和.-and CRC calculation, modbus connection can be calculated Statute/CDT Statute/DISA Statute/DF1 Statute/DNP Statute/18 01 of the Statute, such as checksum.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001508s ]
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:0.104891s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.013859s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.012586s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.004311s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003467s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001333s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006751s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.026933s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001780s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 300807 [ RunTime:0.017784s ]
