Updating tables through object views in oracle 2 way iphone cam sex
The MERGE statement uses the merge_insert_clause when the condition of the ON clause is false.As with any normal insert, if the insert clause is executed, all insert triggers defined on the target table are fired.You should use the MERGE statement to select rows from one or more sources for insert or update of one or more tables.The decision to perform an insert or update is based on conditions specified by you.
merge_update_clause - The merge_update_clause is used to specify the update column values of the target table.ON Clause - The ON clause specifies the condition that the MERGE operation uses to determine whether it updates or inserts.When the search condition evaluates to true, Oracle updates the row in the target table with corresponding data from the MERGE source.MERGE is what is known as a deterministic statement.That is, you can only update the same row of the target table once in the same MERGE statement.
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If both are specified, then the order of the clauses is not important.