Converting Access Code to SQL

Question

I have the following code in Access and I need it to work in sql, the Is numeric portion is throwing me off.

Sum([Employee Count]*IIf(IsNumeric([Length]),[Length         


        

Answer 1

You will replace the IIF() with a CASE expression. The IsNumeric() is valid in SQL Server:

Sum([Employee Count]*
    case when IsNumeric([Length]) = 1
          then [Length]
          else 0 end) AS Total_hours,

Answer 2

You can also just filter "not isnumeric" out since 0 will not impact SUM aggregation.

select
Sum([Employee Count]*[Length]) AS Total_hours
...
where isnumeric([Length]) = 1

See code below.

declare @table table (abc varchar(100))
insert into @table
select '1'
union select '200'
union select '200A'

select sum(convert(int,abc))
from @table
where isnumeric(abc) = 1

sqlfiddle