计算列的总和并将其分配给变量

Question

我想执行列的总和并将结果赋值给变量。我已经尝试了以下语法。

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

如果使用SQL然后尝试下面的脚本：

Declare @variable int 

Select @variable = sum(cost) from retail 

Print @variable 

或者

Declare @variable Numeric(18,2) 

Select @variable = sum(cost) from retail 

Print @variable 

Answer 2

在HANA的SQLScript这将是语法：

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