Updating deleting predicates oracle

This chapter turns the tables, and focuses on the following three topic areas: For ease in finding them when you need them, recipes in this chapter have been grouped by topic: all the insertion recipes come first, followed by the update recipes, and finally recipes for deleting data. It begins with the simple problem of inserting a single row.Many times, however, it is more efficient to use a set-based approach to create new rows.It enables us to conditionally update or insert data into a target table and in many cases is more flexible and efficient than previous hand-coded "UPSERT" solutions.

This will enable us to keep the column lists short for the INSERT operations in the examples.

We'll begin by demonstrating a straight MERGE supported by Oracle 9i.

To that end, you’ll also find techniques for inserting many rows at a time.

Likewise, updating and deleting start out as simple tasks.

Cursors facilitate subsequent processing in conjunction with the traversal, such as retrieval, addition and removal of database records.

The database cursor characteristic of traversal makes cursors akin to the programming language concept of iterator.

if inserting then INSERT INTO SRC_TBL (CFG_NAME, CFG_VALUE) VALUES(: NEW. CFG_VALUE); elsif updating then UPDATE SRC_TBL SET CFG_VALUE = : NEW. Is it possible to make a grid edit fire the trigger?

Or does Sql Dev offer an alternate native grid which could fire the trigger?

If you have an interface built to interact with the data, that would also mean you have to maintain multiple versions of these interfaces.

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