How to execute mathematical expression stored in a varchar variable

Question

I have a variable in my database function:

@LocalVariable = \'2*3*100\'

I want to get the result by executing the expression in another var

Answer 1

You could use sp_executesql:

declare @expression nvarchar(max)
set @expression = '2*3*100'

declare @sql nvarchar(max)
set @sql = 'select @result = ' + @expression

declare @result int
exec sp_executesql @sql, N'@result int output', @result = @result out

select @result

Example at SE Data.