UPDATE to my question. I found the answer and will edit the sample code. Thanks to those who tried to help me.
The following test script checks out okay in the tool "Run SQL Scripts" and with an online SQL Syntax checker. However, when deploying it as a Stored Procedure to a DB2 database on our IBM I using IBM Data Studio, it fails with the "[SQL0029] INTO clause missing from embedded statement". Searched far and wide in Google but nothing I found helped. Need a sanity check. What am I doing wrong?
CREATE PROCEDURE uspTotTripsCreatByAgtMoYr (
IN pForMonth NUMERIC(2),
IN pForYear NUMERIC(4)
)
RESULT SETS 1
LANGUAGE SQL
P1: BEGIN
-- Temp table.
DECLARE GLOBAL TEMPORARY TABLE SESSION.tmpTTBA
(
UID CHAR(8) NOT NULL,
NUMTRPCREATED NUMERIC(6) NOT NULL,
ENDATEYR NUMERIC(4) NOT NULL,
ENDATEMO NUMERIC(2) NOT NULL,
DIVCODE CHAR(2) DEFAULT 'ZZ'
) WITH REPLACE ON COMMIT PRESERVE ROWS;
-- BEGIN PROOF OF CONCEPT
INSERT INTO SESSION.tmpTTBA (UID, NUMTRPCREATED, ENDATEYR, ENDATEMO)
SELECT
TM."RecordEntryUserID",
COUNT(TM."TripNumber"),
TM."RecordEntryDateYear",
TM."RecordEntryDateMonth"
FROM FXDTAZZ."TripMaster" "TM"
GROUP BY TM."RecordEntryUserID",
TM."RecordEntryDateYear",
TM."RecordEntryDateMonth"
HAVING (TM."RecordEntryDateYear" = pForYear)
AND (TM."RecordEntryDateMonth" = pForMonth);
-- END PROOF OF CONCEPT
-- Sanity check POC
-- SELECT * FROM SESSION.tmpTTBA;
-- The previous SELECT line by itself is what was causing
-- the SQL0029 error in the RUN SQL SCRIPT Editor.
-- Here is the way to do it. Slaps himself in the forehead
-- for not figuring it out earlier. The important thing was
-- enclosing it in a new BEGIN...END routine block, along
-- with declaring and opening a cursor.
BEGIN
DECLARE c_tmp CURSOR WITH RETURN TO CLIENT FOR
-- returns all rows
SELECT * FROM SESSION.tmpTTBA;
OPEN c_tmp;
END;
-- BEGIN AGGREGATION CODE FOR ALL SCHEMAS HERE
-- Start with FXDTAAA and loop to the end with FXDTAZZ
-- END AGGREGATION
-- Clean up
DROP TABLE SESSION.tmpTTBA;
END P1
this compiles. select into a variable. Not sure how it runs without returning a result set.