决策树是用二叉树形图来表示处理逻辑的一种工具。可以直观、清晰地表达加工的逻辑要求。特别适合于判断因素比较少、逻辑组合关系不复杂的情况。
-Decision tree is a tree-shaped diagram used to indicate the processing logic as a tool. Can be intuitive, clear logic processing requirements. Particularly suited to determine the factors that have relatively less logical combination of relations with complex situations.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001419s ]
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:0.087253s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001177s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001182s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003930s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001029s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014681s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001264s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 173155 [ RunTime:0.001362s ]