php - Mysql 在同一查询中使用 AND & OR LIKE 时排除第一个参数？

Question

我正在尝试执行这个非常简单的查询。

links_public 1 = show

links_public 0 = dont show

但是，当运行下面的查询时，它仍然返回所有 links_public 设置为 0 的行。

 SELECT *
 FROM links
 WHERE links_public = '1'
 AND links_description LIKE '%$filter%'
 OR links_created_by LIKE '%$filter%'
 OR links_link LIKE '%$filter%'
 ORDER BY links_created DESC

Answer 1

尝试使用一些括号。

有点像

 SELECT *
 FROM links
 WHERE links_public = '1'
 AND (links_description LIKE '%$filter%'
 OR links_created_by LIKE '%$filter%'
 OR links_link LIKE '%$filter%')
 ORDER BY links_created DESC

你拥有它的方式，它被视为

SELECT *
 FROM links
 WHERE (links_public = '1'
 AND links_description LIKE '%$filter%')
 OR links_created_by LIKE '%$filter%'
 OR links_link LIKE '%$filter%'
 ORDER BY links_created DESC

看看12.3.1. Operator Precedence