问题
I have two numbers I want to divide: 5262167 / 162333331 When verified using windows calculator (calc.exe) the result is 0.0324158136076195 but when used simple select with CAST function in SQL Server 2008R2 I don't have same result. Here is what I'm running in SQL editor:
select CAST((5262167 / 162333331) as decimal(18,8))
and the result is 0.00000000
回答1:
You're doing integer division, which will truncate any remainders. 5262167 < 162333331, so your result is 0. Cast your input before dividing.
select CAST(5262167 as decimal(18,8)) / CAST(162333331 as decimal(18,8))
回答2:
Another less elegant way is: select ( 5262167 * 1.0 ) / ( 1623333331 * 1.0 ) ). I usually forget to cast them and just multiply by 1.0.
来源：https://stackoverflow.com/questions/16484434/division-of-2-numbers-using-cast-function-in-sql-server-2008r2