linux下，自编的一个基于linux文件系统的数据库，实现简单的数据库操作，适于初学者。编译后运行主程序demo。-linux under a self-linux-based file system database, the realization of a simple database operation, suitable for beginners. After compiling the main program running demo.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002381s ]
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:0.085569s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001716s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001967s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002474s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003706s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002142s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003321s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015222s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002661s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 119479 [ RunTime:0.001280s ]
