How to pass multiple integer values in one parameter in SQL Server - sql

Question

I am in the process of producing a report in SSRS and trying to add a check in to say when this parameter equals this value then display these values, but because the parameter is an integer and I can't pass multiple integer values into the one parameter.
How can I do this?
Here is example of what I am trying to do:
DECLARE #EntityGroupID INT
SET #EntityGroupID = 741
IF #EntityGroupID = 741
BEGIN
SET #EntityGroupID= 3097,3098,3099,3100,3101,3125
END
SELECT *
FROM tEntityGroup
WHERE ID in (#EntityGroupID)

Answer 1

Why not just use two SELECT statements. If you already have your control flow, just use it to do the SELECT, e.g.
DECLARE #EntityGroupID INT
SET #EntityGroupID = 741
IF #EntityGroupID = 741
BEGIN
SELECT *
FROM tEntityGroup
WHERE ID IN (3097,3098,3099,3100,3101,3125);
END
ELSE
BEGIN
SELECT *
FROM tEntityGroup
WHERE ID = #EntityGroupID;
END
Or if you really want to do it with a single select, then use a table variable:
DECLARE #EntityGroupID INT
SET #EntityGroupID = 741
DECLARE #Entities TABLE (ID INT NOT NULL);
INSERT #Entities (ID)
SELECT #EntityGroupID
WHERE #EntityGroupID != 741
UNION ALL
SELECT ID
FROM (VALUES (3097),(3098),(3099),(3100),(3101),(3125)) t (ID)
WHERE #EntityGroupID = 741;
SELECT *
FROM tEntityGroup
WHERE ID in (SELECT ID FROM #Entities);

Answer 2

Pass it as table variable like
declare #tbl table(EntityGroupID int);
insert into #tbl
select 3097
union
select 3098
union
select 3099
Then you can just say
SELECT *
FROM tEntityGroup
WHERE ID in (select EntityGroupID from #tbl);

Answer 3

You can first create a table variable with ID,Value pair as:
DECLARE #EntityGroup TABLE(Id INT, VALUE VARCHAR(50))
INSERT INTO #EntityGroup VALUES (741,null)
IF (SELECT Id FROM #EntityGroup) = 741
BEGIN
update #EntityGroup SET VALUE = '3097,3098,3099,3100,3101,3125' WHERE Id = 741
END
and then we can extract the data as required:
SELECT *
FROM tEntityGroup
WHERE ID in
(
SELECT LTRIM(RTRIM(m.n.value('.[1]','varchar(8000)'))) AS EntityGroupID
FROM
(
SELECT CAST('<XMLRoot><RowData>' + REPLACE(VALUE,',','</RowData><RowData>') + '</RowData></XMLRoot>' AS XML) AS x
FROM #EntityGroup
)t
CROSS APPLY x.nodes('/XMLRoot/RowData')m(n)
)