用PHP4连接一个mysql数据库操作的演示，实现连接打开一个库，并读取数据的基本功能。-PHP4 to connect with a mysql database operations presentation, connect to open a library, and read the basic functions of data.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001412s ]
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:0.126385s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001681s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001920s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001472s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005206s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001172s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006609s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.021719s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.000958s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 35744 [ RunTime:0.017521s ]
