case ステートメントの大なり演算子でエラーが発生します。ここで何が欠けていますか?
DECLARE @ODS_LOAN_MAXDATE DATE, @MAX_MAINTENANCE DATE, @MAX_TRANS DATE, @ODS_LOAN_Count int
SELECT @MAX_MAINTENANCE = MAX(DATE_MAINTENANCE_LAST) FROM FISERV_ODS..LOAN_MASTER_FILE
SELECT @MAX_TRANS = MAX(DATE_TRANS_LAST) FROM FISERV_ODS..LOAN_MASTER_FILE
SELECT CASE @ODS_LOAN_MAXDATE
WHEN @MAX_MAINTENANCE > @MAX_TRANS
THEN @MAX_MAINTENANCE
ELSE @MAX_TRANS
END
FROM FISERV_ODS..LOAN_MASTER_FILE