Question

How can i make the following query to work :-

Declare @Ids as varchar(20);

Set @Ids = '1,2,3,4';

Delete from tblProduct
Where ProductId in (@Ids);

Answer 1

where ',' + @Ids + ',' like '%,' + cast(ProductId as varchar) + ',%'

But seriously, I would’ve used a TVF that splits up this string and then you inner join the resulting ids with your table and delete the rows like so:

delete d
from [table] d
join dbo.fnSplitString(@Ids, ',') s on d.id = s.id