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Updating two tables in oracle twitter oasis dating

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With the DB2/400 database embedded in i5/OS V5R4, these modification statements against multi-table views can be accomplished with a special type of trigger called an INSTEAD OF trigger. The biggest benefit I see for this feature is in the client/server realm.INSTEAD OF triggers are special SQL triggers that give the database specific code to run when performing data manipulation (INSERT, UPDATE, and DELETE) against a view. For instance, many third-party, PC-based packages offer simple ODBC interfaces that can only link to a single table to do data updates.For simplicity, consider the following common scenario: An i Series has multiple item tables holding data related in a one-to-one relationship.

It would be perfect if we could simply issue INSERT, UPDATE, and DELETE statements against the multi-table view ITEMVIEW. Item; End; The name specified in the old, new portions of the Referencing clause are used to refer to columns in the row being modified–in the case of the INSTEAD OF UPDATE trigger, Item View Old and Item View New represent the before and after pictures respectively. Why would we want to use triggers on a view instead of, say a stored procedure, which could accomplish the same thing?

The WHERE clause specifies which record(s) that should be updated.

If you are an application programmer then you will more than likely need to write TSQL code to update your SQL Server database tables.

Consider another table STUDENT_N, which holds updates for the target table STUDENT.

Every week, table STUDENT needs to be synchronized with the data in STUDENT_N – any new entries for students who attempted the GMAT to be inserted, plus corrections if any made to the existing details.