Sql 将数值转换为数据类型数值时出现算术溢出错误
将精度大于精度的值转换为要转换的值会导致错误 以下是重现错误的示例:Sql 将数值转换为数据类型数值时出现算术溢出错误,sql,sql-server,Sql,Sql Server,将精度大于精度的值转换为要转换的值会导致错误 以下是重现错误的示例: ALTER FUNCTION [dbo].[avgGpa]() RETURNS decimal(3,2) AS BEGIN DECLARE @CalcGPA decimal(10,2) DECLARE @CalcGPA2 decimal(3,2) SELECT @CalcGPA = SUM(cast(GPA AS decimal(10,2))) from dbo.Students SELECT
ALTER FUNCTION [dbo].[avgGpa]()
RETURNS decimal(3,2)
AS
BEGIN
DECLARE @CalcGPA decimal(10,2)
DECLARE @CalcGPA2 decimal(3,2)
SELECT @CalcGPA = SUM(cast(GPA AS decimal(10,2))) from dbo.Students
SELECT @CalcGPA2 = cast(ROUND((@CalcGPA / 1000),2) AS decimal(3,2))
RETURN @CalcGPA2
END
给出更大的精度值
declare @d10 decimal(10,2)=12345678.12
select CAST(@d10 as decimal(3,2))
(1) 你为什么在函数中这样做?(2) 为什么要将GPA存储为字符串?(3) ?此链接回的重复问题已删除。看起来是过度热情的节制?
ALTER FUNCTION [dbo].[avgGpa]()
RETURNS decimal(15,2)