计算列的总和并分配给变量

Question

我想执行列的总和并将结果分配给变量。我尝试了以下语法。

declare variable double;
 variable:= select sum(cost) from retail 

or 
select sum(cost)from retail into variable.

请建议正确的语法。

Answer 1

在HANA的SQLScript中，这将是语法：

declare variable double; 
select sum(cost) into variable from retail;

Answer 2

如果您使用sql，请尝试以下脚本：

Declare @variable int

Select @variable = sum(cost) from retail

Print @variable

或

Declare @variable Numeric(18,2)

Select @variable = sum(cost) from retail

Print @variable