17.05 - Example: MERGE and Target Columns - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Manipulation Language

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Release Date
January 2021
Content Type
Programming Reference
Publication ID
B035-1146-175K
Language
English (United States)

The following example fails because the INSERT specification of the WHEN NOT MATCHED clause specifies a column, z1, from the target table t1, which is an illegal operation.

     MERGE INTO t1
     USING (SELECT x2,y2, z3
            FROM t2, t3
            WHERE y2=10) AS s
       ON x1=y2 AND t4.x4=z2
     WHEN MATCHED THEN
       UPDATE SET z1=10
     WHEN NOT MATCHED THEN
       INSERT (x1,y1, z1) VALUES (y2, t1.z1, x2);