Merge into when matched then update oracle

Make the ON condition broad enough to match both situations, then use CASE expressions inside the UPDATE to do different things for the two different types of rows you will be changing. I realize this description is kind of vague. The MERGE statement allows you to specify a condition to determine whether to update data from or insert data into the target table. The merge _ update _clause specifies the new column values of the target table.

If the update clause is execute then all update triggers defined on the target table are activated.

A merge which only does an update on matched , not an insert on not- matched , seems not to work in this version. I am unable to upgrade. Home Articles 10g Here. I have following MERGE statement. Table table_A contains list of ID (cli_id) and column fb_flag.

The query inside update the column fb_flag in table_A when cli_id is matching. If the condition is not true for any rows, then the database inserts into the target table based on the corresponding source table row.

Oracle Merge Statements. Is there a way to use oracle merge to insert and delete but not update ? Please help me rectify it. When I asked back what the answer was, The person said that if the Number of updates were high then its better to have a Update followed by a Insert. I was a bit taken back.

Diese Seite beschreibt das SQL MERGE Kommando. Wie alle anderen Entwickler kommt auch der APEX-Entwickler immer wieder in die Verlegenheit, eine oder mehrere Zeilen in eine Tabelle hineinzumischen. Restrictions on Updating a View. You cannot specify DEFAULT when updating a. Merge is used to combine one or more DML statements into one. MERGE INTO target TGT USING source SRC ON SRC.

WHEN MATCHED THEN UPDATE specifies the new column values of the target table. Use the MERGE statement to select rows from one table for update or insertion into another table. The decision whether to update or insert into the target table is based on a condition in the ON clause. It is also known as UPSERT i.

In the MERGE statement, this is called the merge condition. In an INNER JOIN, it is called a join condition. Column Update – Each has a SET clause to specify which columns are updated.

Key Differences between MERGE and UPDATE First Difference. With MERGE , you’re able to combine update , delete, and insert command into one statement. Marks = CASE WHEN Target. Subject IS NOT NULL THEN Source. ProductName OR TARGET.

Rate THEN UPDATE SET TARGET.