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Developer-C 11.1
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IF OBJECT_ID(N'T')IS NOT NULL DROP TABLE Tl; CREATE TABLE T(ID INT NOT NULL, V INT NULL); INSERT T(ID,V)VALUES(1,1),(2,NULL),(3,-100),(4,0); SELECT * FROM T; DECLARE @ID INT=3, @V INT=55; MERGE T USING(VALUES(@ID,@V))S(ID,V) ON T.ID=S.ID WHEN MATCHED THEN UPDATE SET V=S.V WHEN NOT MATCHED THEN INSERT(ID,V)VALUES(S.ID,S.V); SELECT * FROM T;
ID
V
1
1
2
null
3
-100
4
0
ID
V
1
1
2
null
3
55
4
0