一个linux下字符设备驱动程序的编写例子，是自己参考了相关资料的修改版本-Characters under a linux device driver for the preparation of example is their reference to a modified version of relevant information
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001324s ]
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:0.087929s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001193s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001979s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001166s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003656s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001109s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003208s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014469s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001331s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 243547 [ RunTime:0.001413s ]
