这是计算机算法中的回溯法中的一个经典的问题－－Ｎ皇后问题！希望对学计算机算法的同学有用！-This is a computer algorithm, the retroactive law on the issue of a classic-- N Queen! Want to learn how to use computer algorithms useful to the students!
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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:0.089456s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001213s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001118s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001338s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 121441 [ RunTime:0.001378s ]
