CREATE TABLE #Temp
(
    CollectionID smallint NOT NULL,
    IncludedSectionID smallint NOT NULL
)

INSERT INTO #Temp (CollectionID, IncludedSectionID) VALUES(0, 0);
INSERT INTO #Temp (CollectionID, IncludedSectionID) VALUES(0, 1);

SELECT * FROM #Temp;

CREATE TABLE #tblCollectionGameList
(
    ID smallint IDENTITY(0,1) NOT NULL,
    CollectionID smallint NOT NULL,
    IncludedSectionID smallint
)

INSERT INTO #tblCollectionGameList (CollectionID, IncludedSectionID) VALUES(0,0);
INSERT INTO #tblCollectionGameList (CollectionID, INcludedSectionID) VALUES(0,2);

SELECT * FROM #tblCollectionGameList;

BEGIN TRAN

MERGE #tblCollectionGameList AS t
USING #Temp AS s
ON (t.CollectionID = s.CollectionID)
WHEN NOT MATCHED BY TARGET
    THEN
        INSERT(CollectionID, IncludedSectionID) VALUES (s.CollectionID, s.IncludedSectionID)
WHEN NOT MATCHED BY SOURCE
    THEN
        DELETE;

SELECT * FROM #tblCollectionGameList;

ROLLBACK TRAN

DROP TABLE #Temp;
DROP TABLE #tblCollectionGameList;