Example: Using the Target Table as the Source Table - Advanced SQL Engine - Teradata Database

The following example uses target table t1 as its source table:

     MERGE INTO t1        USING t1 AS s        ON t1.a1 = s.a1      WHEN MATCHED THEN        UPDATE SET b1 = 10      WHEN NOT MATCHED THEN        INSERT VALUES (s.a1, s.b1, s.c1);