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Integer math
From Wiki
What do you think the following query will return in SQL Server?
- SELECT 3/2
If you said 1.5 then you are wrong! The correct answer is 1, this is because when doing division with 2 integers the result will also be an integer.
There are two things you can do
1 multiply one of the integers by 1.0
2 convert one of the integers to a decimal
Integer math is integer result (1)
- DECLARE @Val1 INT,@val2 INT
- SELECT @Val1 =3, @val2 =2
- SELECT @Val1/@Val2
Convert explicit or implicit to get the correct answer (1.50000000000000)
- DECLARE @Val1 INT,@val2 INT
- SELECT @Val1 =3, @val2 =2
- --Implicit
- SELECT @Val1/(@Val2*1.0)
- --Explicit
- SELECT CONVERT(DECIMAL(18,4),@Val1)/@Val2
Contributed by: --SQLDenis 03:13, 31 May 2008 (GMT)
Part of SQL Server Programming Hacks
Section Pitfalls
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