I have added a filter expression using the like operator. What do I put in the value field? my parameter is named @test and I\'d like the filter to function as a like %@te
You could also simply use string concatenation in the original Dataset that you want to filter on. You can access the parameters in the same manner as SQL:
WHERE fieldname LIKE '%' + @test + '%'
You can then link the report parameter @test to the @test in the dataset via the parameters option on Dataset Properties.