access statement convert to Sql

Question

我该如何转换为T-Sql？

IIf([ESSValue]<>0,Int([ESSValue]*100),"")

Answer 1

I think the following pretty much does what you want:

select coalesce(cast(EssValue * 100 as int), 0)

Here is the thinking. The comparison to zero is unimportant, because 0 times any value is going to be zero. The iif() returns an integer (I think) because the "then" argument is an integer; the empty string gets converted to zero.

I'm not 100% certain about the last statements with regard to MS Access, but that is how iif() works in SQL Server.

I should add. Although I don't approve of iif() for conditional expressions (because case is the standard and more powerful), SQL Server does support it. So you could write:

IIf([ESSValue]<>0, cast([ESSValue]*100 as int), '')

Note: As I mentioned earlier, the '' will be converted to 0 .

Answer 2

CASE WHEN ESSValue <> 0 
     THEN CAST(ESSValue * 100 AS INT)
     ELSE NULL
END as fieldname

For case expression the default is NULL if doesn't meet any condition, so you dont really need the ELSE condition