Php Mysql在使用AND&；时排除第一个参数；还是在同一个查询中？

我正在尝试执行这个非常简单的查询

links\u public 1=show

链接\u public 0=不显示

但是，当运行下面的查询时，它仍然返回链接设置为0的所有行

 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

改变

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

到

---

尝试使用一些括号

差不多

 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

从你拥有它的方式来看，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

---

查看一下

将括号放在周围，然后尝试：

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

---

OR正在产生问题。您需要使用（）对条件进行分组。你应使用：-

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

---

也许你应该添加一些（）来确定优先级。OR正在制造一个问题。当没有评论就被否决时，总是感觉很糟糕。请评论！！

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