读写XML文件，根据不同的选择显示不同的XML节点信息，超级棒的例子。-read and write XML documents, according to the different options show different XML node information, the super rods example.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001892s ]
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:0.112269s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001938s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001992s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001351s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004361s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000856s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.008897s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.021976s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001136s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 278166 [ RunTime:0.022340s ]
