WHERE语句中的CASE语句（等于和不等于）

Question

我有以下查询，其中我试图根据位变量的值从表中返回不同的值。

有没有一种方法可以代替where条件使之起作用？

DECLARE @isAggregate bit = 0

SELECT 
    *
FROM
    Fields
WHERE
    FieldType  
    CASE 
        WHEN @isAggregate = 1 THEN = 'Aggregate'
        WHEN @isAggregate = 0 THEN <> 'Aggregate'
    END

Answer 1

您可以使用布尔逻辑，情况expression不能以这种方式工作：

where (@isAggregate = 1 and FieldType = 'Aggregate') or
      (@isAggregate = 0 and FieldType <> 'Aggregate')