CREATE TABLE #t1
(PKT1 INT IDENTITY (10,1),
ID INT,
ID2 INT)
CREATE TABLE #t2
 
(PKT2 INT IDENTITY (20,1),
ID INT,
ID2 INT)
INSERT #t1
         ( ID, ID2 )
SELECT 18185, NULL UNION ALL
SELECT 18165, 39875 UNION ALL
SELECT NULL, 39875 UNION ALL
SELECT NULL, 39875 UNION ALL
SELECT 18189, NULL UNION ALL
SELECT NULL, 40001 UNION ALL
SELECT 18163, NULL UNION ALL
SELECT 18495, 40011
 
INSERT #t2
         ( ID, ID2 )
SELECT 18185, NULL UNION ALL
SELECT NULL, 39875 UNION ALL
SELECT 18189, 63751 UNION ALL
SELECT 18495, 40011
 
SELECT * FROM #t1
 
SELECT * FROM #t2
 
SELECT *
FROM #t1
INNER JOIN #t2 ON #t1.ID = #t2.ID
WHERE #t2.ID2 IS NULL
 
UNION ALL
 
SELECT *
FROM #t1
INNER JOIN #t2 ON #t1.ID2 = #t2.ID2
WHERE #t2.ID IS NULL
 
UNION ALL
 
SELECT *
FROM #t1
INNER JOIN #t2 ON #t1.ID = #t2.ID AND #t1.ID2 = #t2.ID2

SELECT
	*
FROM
	#t1 t1
	INNER JOIN #t2 t2 ON 
		(t1.ID = t2.ID AND t2.ID2 IS NULL)
		OR 
		(t1.ID2 = t2.ID2 AND t2.ID IS NULL)
		OR
		(t1.ID = t2.ID AND t1.ID2  = t2.ID2);

SELECT
	*
FROM
	#t1 t1
	INNER JOIN #t2 t2 ON COALESCE(#t1.ID,#t2.ID) = COALESCE(#t2.ID,#t1.ID) 
                          AND COALESCE(#t1.ID2,#t2.ID2) = COALESCE(#t2.ID2,#t1.ID2)

quote:

---

Originally posted by visakh16

SELECT
	*
FROM
	#t1 t1
	INNER JOIN #t2 t2 ON COALESCE(#t1.ID,#t2.ID) = COALESCE(#t2.ID,#t1.ID) 
                          AND COALESCE(#t1.ID2,#t2.ID2) = COALESCE(#t2.ID2,#t1.ID2)

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

---

SELECT *
FROM #t1 t1
INNER JOIN #t2 t2 ON 1 = 
    CASE WHEN /*(t1.ID IS NOT NULL AND t1.ID2 IS NOT NULL) OR*/ (t2.ID IS NOT NULL AND t2.ID2 IS NOT NULL)
         THEN CASE WHEN (t1.ID = t2.ID AND t1.ID2 = t2.ID2) THEN 1 ELSE 0 END
    ELSE CASE WHEN
        (t1.ID IN (t2.ID, t2.ID2) OR t1.ID2 IN (t2.ID, t2.ID2)) THEN 1 ELSE 0 END
    END