Beginning with Oracle Database 11 g Release 2 INTO Clause. Use the INTO clause to specify the target table or view you are updating or inserting into. In order to merge data into a view, the view must be updatable.
Refer to " Notes on Updatable Views " for more information. ON Clause. For each row in the target table for which the search condition is true, Oracle Database updates the row with corresponding data from the source. If the condition is not true for any rows, then the database inserts into the target table based on the corresponding source row.
You can specify conditions to determine whether to update or insert into the target table or view. This statement is a … The MERGE statement was introduced in Oracle 9i to conditionally insert or update data depending on its presence, a process also known as an "upsert".
The decision whether to update or insert into the target table is based on a condition in the ON clause. It is a new feature of Oracle Ver. Otherwise, you can specify which rows from the source table should be copied to the target table.
The idea is to convert recursive code into an iterative one. Add a comment. Active Oldest Votes. I think the Id, Txt shouldn't be there as they were. Txt ;. Taavi Tiitsu Taavi Tiitsu 1 1 silver badge 10 10 bronze badges.
Oracle does not support AS to define aliases for derived tables. Txt The railroad diagram shows there is no such "as" clause. Jeff Holt Jeff Holt 2, 3 3 gold badges 20 20 silver badges 28 28 bronze badges. Heena Shaikh Heena Shaikh 1 2 2 bronze badges.
Sign up or log in Sign up using Google. Oracle performs this update if the condition of the ON clause is true. If the update clause is executed, then all update triggers defined on the target table are activated. The condition can refer to either the data source or the target table.
If the condition is not true, then the database skips the update operation when merging the row into the table. The only rows affected by this clause are those rows in the destination table that are updated by the merge operation. WHERE condition. Any delete triggers defined on the target table will be activated for each row deletion.
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