![]() The above query uses a SELECT statement in the SET clause of the UPDATE statement.It is a straightforward method to update the existing table data from other tables. The subquery defines an internal query that can be used inside a SELECT, INSERT, UPDATE and DELETE statement. The MERGE statement always ends with a semicolon( ).Į.City = A.City Method 3: UPDATE from SELECT: Subquery method.It then updates the and from the table into the table using the THEN UPDATE statement followed by source and target column mappings.The WHEN MATCHED then specifies the merge JOIN (Inner Join) between the source and target table.It then references another table when the USING clause is applied.Use a MERGE statement for updating data in the table. ![]() In the example MERGE statement below, the following tasks are performed: It is an alternative method for performing the UPDATE from the SELECT statement function. The MERGE statement is useful for manipulating data in the target table based on the source table data for both matched and unmatched rows. Method 2: UPDATE from SELECT: The MERGE statement Then execute the UPDATE statement and verify that the source and target column values are the same.
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