Error: Only One Expression Can Be Specified In The Select List When The Subquery Is Not Introduced With EXISTS.

Hi,

  When i try to save my stored procedure.. i am getting the above error and this is my sproc

 1 INSERT INTO Statement..ClientSources
2 (
3 ClientId,
4 ClientSourceId,
5 SourceName
6 )
7 Select Distinct
8 @ClientId,
9 SOURCE_NUM,
10 (Select CASE s.SOURCE_NUMWhen 1 Then SRC1NAME
11 WHEN 2 Then SRC2NAME
12 WHEN 3 THEN SRC3NAME
13 WHEN 4 THEN SRC4NAME
14 WHEN 5 THEN SRC5NAME
15 WHEN 6 THEN SRC6NAME
16 WHEN 7 THEN SRC7NAME
17 WHEN 8 THEN SRC8NAME
18 WHEN 9 THEN SRC9NAME
19 WHEN 10 THEN SRC10NAME
20 WHEN 11 THEN SRC11NAME
21 WHEN 12 THEN SRC12NAME
22 WHEN 13 THEN SRC13NAME
23 WHEN 14 THEN SRC14NAME
24 WHEN 15 THEN SRC15NAME
25 END
26 FROM
27 PlanDBF p
28 Where
29 p.PLAN_NUM = s.PLAN_NUM
30 ) as SourceName
31 FROM
32 SourceDBF s
33 Where
34 SOURCE_NUM NOT IN (
35 SELECT DISTINCT
36 ClientSourceId
37 --SourceName
38 FROM
39 Statement..ClientSources
40 Where
41 ClientId = @ClientId
42 )


 

I am getting the error in Line number 35 .. the inserts works fine... and if use * instead of the field name or use more than 1 field name  i get this error

Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.

Any help will be appreciated.

Regards

Karen