MySQL逻辑运算符 [英] MySQL logical operators

问题描述

给出查询'SELECT foo FROM bar WHERE a = x AND b = y OR c = z'，它如何解析该查询?

Given the query 'SELECT foo FROM bar WHERE a = x AND b = y OR c = z', how does it parse this query?

(a = x AND b = y) OR c = z?
a = x AND (b = y OR c = z)?

这是一个简单的示例，但是如果您将AND/OR与更多的搜索词混合使用，又该如何匹配呢?

That is a simple example, but what about if you're mixing and matching AND / OR with even more search terms?

推荐答案

(a = x AND b = y)或c = z

(a = x AND b = y) OR c = z

http://dev.mysql.com/doc/refman/5.0/en/operator-precedence.html

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