SQL if 的相关内容

文章 2016-04-27 来自：开发者社区

SQL SERVER 2014 下IF EXITS 居然引起执行计划变更的案例分享

这个问题是在SQL SERVER 2005 升级到SQL SERVER 2014的测试过程中一同事发现的。我觉得有点意思，遂稍微修改一下脚本展示出来，本来想构造这样的一个案例来演示，但是畏惧麻烦，遂直接贴上原表，希望 Leader不要叼我（当然个人觉得真没啥，两张表名而已，真泄露不了啥信息）。脚本如下所示，非常简单的一段SQL语句，我将其分为S...

问答 2016-02-11 来自：开发者社区

SQL中存储过程里面没法使用if条件函数

我的mysql的版本是5.6,以下运行的话正常应该使abc=3，但是却出现错误：[Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ' $$ DELIMI.....

问答 2016-02-11 来自：开发者社区

sql中where 之后如何加if条件判断

where IF(2>1,(u.user_rank=0 or ,1 and )rank_disc in( 1, 3, 4) IF(2>1,), ' ' ) and...这是mysql的where条件，这后面的判断 if 要怎么判断呢？现在这样是错的

文章 2015-12-18 来自：开发者社区

SQL SERVER 2014 下IF EXITS 居然引起执行计划变更的案例分享

原文:SQL SERVER 2014 下IF EXITS 居然引起执行计划变更的案例分享这个问题是在SQL SERVER 2005 升级到SQL SERVER 2014的测试过程中一同事发现的。我觉得有点意思，遂稍微修改一下脚本展示出来，本来想构造这样的一个案例来演示，但是畏惧麻烦，遂直接贴上原表，希望Leader不要叼我（当然个人觉得真没啥，两张表名而已，真泄露不了啥信息）。 &...

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