检查多个列中的一个值

问题描述：

例如，我有一个表，其中包含这样的列:

I have a table that has columns like this for example:

id,col1,col2,col3,col4

现在，我要检查col1, col2, col3, col4的ANY是否具有传入的值.

Now, I want to check if ANY of col1, col2, col3, col4 have the passed in value.

要做的很长的路要走.

SELECT * FROM table WHERE (col1 = 123 OR col2 = 123 OR col3 = 123 OR col4 = 123);

我想这是IN的相反版本.

是否有更简单的方法来做我想做的事?

Is there an easier way to do what I want?

答

您可以使用IN谓词，如下所示:

You can use the IN predicate, like so:

SELECT * FROM table WHERE 123 IN(col1, col2, col3, col4);

SQL小提琴演示

它是IN的相反版本.

it's the opposite version of IN.

不，不是，这与您在问题中使用OR的方式相同.

No it is not, It is the same as using the ORs the way you did in your question.

谓词IN或集合成员资格定义为¹:

The predicate IN or set membership is defined as¹:

Value Expression可以是²的地方:

因此，使用值表达式123(这是一个文字)可以做到这一点.

So it is fine to do it this way, using the value expression 123, which is a literal.