Question

I am running SQL Server and I have a stored procedure. I want do a select statement with a WHERE IN clause. I don’t know how long the list will be so right now I have tried something as follows

SELECT * FROM table1 WHERE id IN (@idList)

in this solution @idList is a varChar(max). but this doesn’t work. I heard about passing in table values, but I am confused about how to do that. Any help would be great

Answer 1

I would suggest using a function to split the incoming list (use the link that Martin put in his comment).

Store the results of the split function in a temporary table or table variable and join it in your query instead of the WHERE clause

select * into #ids from dbo.Split(',', @idList)

select t.*
from table1 t
 join #ids i
    on t.id = i.s