SD卡的其本操作函数，很值得借鉴使用．对于SD卡的编程有很大帮助．-SD Card function of its present operation, it is worth learning to use. Programming for the SD card has great help to me.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001090s ]
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:0.058038s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001215s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001261s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000980s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.002989s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000912s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003524s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014395s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001155s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 112948 [ RunTime:0.017612s ]
