添加在SQL中的字符串变量中声明的十进制值

Question

Declare @RuleExp as Varchar(max)
,@Val1 Decimal(18,2) = 12.00
,@Val2 Decimal(18,2) = 13.00


select @RuleExp = @Val1 + @Val2

我需要值的总和（即）25。但我得到的字符串值为12.00 + 13.00。 请帮我解决这个问题。

提前致谢！

Answer 1

Declare @RuleExp Decimal(18,0)
,@Val1 Decimal(18,2) = 12.00
,@Val2 Decimal(18,2) = 13.00


select @RuleExp = @Val1 + @Val2
select cast(@RuleExp as varchar(max))

Answer 2

Declare @RuleExp as Varchar(max)
,@Val1 Decimal(18,2) = 12.00
,@Val2 Decimal(18,2) = 13.00


set @RuleExp = @Val1 + @Val2
select @RuleExp