TSQL Select Clause with Case Statement - sql-server

Question

I have a basic select statement that is getting me a list of types that are stored in the database:
SELECT teType
FROM BS_TrainingEvent_Types
WHERE source = #source
FOR XML PATH ('options'), TYPE, ELEMENTS, ROOT ('types')
My table contains a type column and a source column.
There is a record in that table where I need to include it for two separate sources but I can't create a separate record for it.
**Table Data**
type | source
test users
test2 members
test3 admins
I need a case statement to be able to say IF source = admins also give me the type test2.
Does this make sense and is it possible to do with a basic select?
Update
I came up with this temp solution but I still think there is a better way to handle this.:
DECLARE #tmp AS TABLE (
QID VARCHAR (10));
INSERT INTO #tmp (QID)
SELECT DISTINCT qid
FROM tfs_adhocpermissions;
SELECT t.QID,
emp.FirstName,
emp.LastName,
emp.NTID,
(SELECT accessKey
FROM TFS_AdhocPermissions AS p
WHERE p.QID = t.QID
FOR XML PATH ('key'), TYPE, ELEMENTS, ROOT ('keys'))
FROM #tmp AS t
LEFT OUTER JOIN
dbo.EmployeeTable AS emp
ON t.QID = emp.QID
FOR XML PATH ('data'), TYPE, ELEMENTS, ROOT ('root');

Answer 1

try this
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--create temp table for testing
IF OBJECT_ID('Tempdb..#BS_TrainingEvent_Types') IS NOT NULL
DROP TABLE #BS_TrainingEvent_Types
SELECT [type] ,
[source]
INTO #BS_TrainingEvent_Types
FROM ( VALUES ( 'test', 'users'), ( 'test2', 'members'),
( 'test3', 'admins') ) t ( [type], [source] )
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--final query
DECLARE #Source VARCHAR(10) = 'users'
IF #Source = 'admins'
BEGIN
SELECT [Type]
FROM #BS_TrainingEvent_Types
WHERE source = #source
OR [type] = 'test2'
FOR XML PATH('options') ,
TYPE ,
ELEMENTS ,
ROOT('types')
END
ELSE
BEGIN
SELECT [Type]
FROM #BS_TrainingEvent_Types
WHERE source = #source
FOR XML PATH('options') ,
TYPE ,
ELEMENTS ,
ROOT('types')
END

Answer 2

select sq.teType
from (
SELECT t.teType
FROM BS_TrainingEvent_Types t
WHERE t.source = #source
union all
SELECT t.teType
FROM BS_TrainingEvent_Types t
WHERE #source = 'admins' and t.source = 'members'
) sq
FOR XML PATH ('options'), TYPE, ELEMENTS, ROOT ('types');
Though normally it would be better to introduce an additional table that would store these relationships, so that the whole idea would be more expandable.