Sql语句冲突

Question

SQL问题

遇到以下陈述的问题

select * 
from products 
where Shop = 3 
or Shop = 5 
or Shop = 6 
or Shop = 7 
and Active <> 0

它选择商店没有问题，但总共绕过了查询的活动部分??

我错过了什么，但不确定是什么。 尝试移动语句，即首先是活动请求，但可能没有区别。

Answer 1

喜欢这个

SELECT * FROM products WHERE shop IN (3,5,6,7) AND active <> 0`       

OR

SELECT * FROM products WHERE ( shop = 3 OR shop = 5 OR shop = 6 OR shop = 7) AND active <> 0

Answer 2

您需要在括号中包含OR语句：

select * 
from products 
where (Shop = 3 
or Shop = 5 
or Shop = 6 
or Shop = 7) 
and Active <> 0

否则有效＆lt;＆gt;使用Shop = 7

评估0

Answer 3

在AND

之前评估

OR

SELECT * FROM products 
WHERE (Shop = 3 OR Shop = 5 OR Shop = 6 OR Shop = 7) 
AND Active <> 0

或

SELECT * FROM products 
WHERE Shop IN (3,5,6,7) 
AND Active <> 0

Answer 4

您应该使用 IN 或（）

SELECT * FROM products WHERE shop IN (3,5,6,7) AND active <> 0

OR

SELECT * FROM products WHERE ( shop = 3 OR shop = 5 OR shop = 6 OR shop = 7) AND active <> 0

Answer 5

尝试使用括号，以便SQL引擎了解您的AND和OR条件：

select * 
from products 
where (Shop = 3 
or Shop = 5 
or Shop = 6 
or Shop = 7 )
and Active <> 0

Answer 6

and优先级高于or。所以Shop = 7并且有效＆lt;＆gt; 0一起计算。 所以下面的陈述是可以的。

1. SELECT * FROM products WHERE (Shop = 3 OR Shop = 5 OR Shop = 6 OR Shop = 7) AND Active <> 0

2. SELECT * FROM products WHERE Shop IN (3,5,6,7) AND Active <> 0