Question

我想在我的网站上创建搜索。在搜索表单中，我有搜索的类别和输入查询。例如，在类别中选择 jmovies ，在 ashi 的输入查询im类型关键字中。

我的代码

SELECT * 
FROM master_post 
WHERE category = 'jmovies' 
    AND master_post_name LIKE '%ashi%' 
    OR altname LIKE '%ashi%'

所以category = jmovies 和keyword = ashi 。

例如我有这样的表

category     master_post_name    alt_name
===========  ==================  ===============
JMovies      ashi_include_1      not_include
JMovies      ashi_include_2      not_include
JMovies      ashi_include_3      not_include
JMovies      not_include         ashi_include_1
JMovies      not_include         not_include
Drama        ashi_in_drama       ashi_include_2

如果我使用该代码运行结果是

category     master_post_name    alt_name
===========  ==================  ===============
JMovies      ashi_include_1      not_include
JMovies      ashi_include_2      not_include
JMovies      ashi_include_3      not_include
JMovies      not_include         ashi_include_1
Drama        ashi_in_drama       ashi_include_2

问题是，因为我选择 jmovies ，类别戏剧不应该在我的结果中，即使戏剧在 ashi > master_post 或 alt_name 。

结果必须像这样

category     master_post_name    alt_name
===========  ==================  ===============
JMovies      ashi_include_1      not_include
JMovies      ashi_include_2      not_include
JMovies      ashi_include_3      not_include
JMovies      not_include         ashi_include_1

即使即时选择 jmovies 而未填写输入关键字，结果也不仅仅显示jmovies，但它也显示戏剧。

注意： alt_name 和 master_post_name 具有相同的关键字。

Answer 1

我不是专家，但请给括号：

SELECT * FROM master_post 
WHERE category = 'jmovies' AND (master_post_name LIKE '%ashi%' OR altname LIKE '%ashi%')

请参阅此答案：How exactly does using OR in a MySQL statement differ with/without parentheses?

Answer 2

我不确定我是否理解您的问题，但您可以尝试以下查询：

SELECT * FROM master_post 
WHERE category = 'jmovies' AND (master_post_name LIKE '%ashi%' OR altname LIKE '%ashi%')

我怀疑＆＃34;问题＆＃34;这里的事实是AND运算符的优先级高于OR运算符。

如何在MySQL中使用AND和OR

2 个答案: