程序提供了对文件指针的操作，利用指针可以快速的在文件中定位，进行插入替换等操作-procedures for the operation of the file pointer, the use of indicators to quickly position in the document, other drop-in replacement operation
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001373s ]
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:0.093350s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001260s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001887s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001232s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003637s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001045s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003307s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014700s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001327s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 156122 [ RunTime:0.001258s ]
