sql-server - 关键字“SELECT”变量附近的语法不正确

Question

关键字“SELECT”附近的语法不正确...下面的代码生成错误...

DECLARE @A VARCHAR(12)
SET @A = SELECT TOP 1 MBR_ID FROM MBR_IDS ORDER BY NEWID()
SELECT @A 

Answer 1

作为 JoeFletch 的好答案的替代方法，您可以使用括号()在标量上下文中评估查询：

SET @A = (SELECT TOP 1 MBR_ID FROM MBR_IDS ORDER BY NEWID())

Answer 2

你需要重组你的SELECT陈述。

DECLARE @A VARCHAR(12)
SELECT TOP 1 @A = MBR_ID FROM MBR_IDS ORDER BY NEWID()
SELECT @A