如何在MySQL中使用AND和OR

我想在我的网站上创建一个搜索。在搜索表单中，我有用于搜索的类别和输入查询。例如，在类别im选择中，jmovies和在输入查询中，ashi的im类型关键字

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，我有这样的桌子

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

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

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，由于我选择了电影，所以我的结果中不应该有戏剧类，即使戏剧类在《大师邮报》或《另类名字》中有ashi

结果一定是这样

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
JMovies      not_include         not_include
Drama        ashi_in_drama       ashi_include_2

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im choicejmovies和not fill输入关键字结果也不仅显示jmovies，还显示了戏剧

---

注意：alt\u name和master\u post\u name具有相同的关键字。

我不是专家，但请用括号括起来：

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

---

查看此答案：

我不确定是否正确理解了您的问题，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%')

---

我怀疑这里的“问题”在于AND运算符的优先级高于OR运算符。

这不就是在查询中添加一些括号的情况吗？请参阅括号？我希望你指的是括号@Chris:-）啊，我明白了，我知道必须用“（“and”）”但我不知道怎么用它，也不知道它叫什么名字，所以这就是括号。