Oracle trigger if inserting or updating josh zuckerman dating

Posted by / 28-Sep-2019 19:17

It is rare, indeed, to find a PL/SQL program that does not either read from or make changes to tables in a database.

Tables are made up of rows of data, each consisting of one or more columns, so it stands to reason that Oracle Database would make it as easy as possible to work with those rows of data inside a PL/SQL program.

Here _in indicates an IN parameter.) That is, however, an awful lot of code to write, read, and maintain.

A much better approach is to fetch that row of data into a record, and the best way to declare that record is as follows: CREATE PROCEDURE process_employee ( employee_id_in IN omag_employees.employee_id%TYPE) IS l_employee omag_employees%ROWTYPE; BEGIN SELECT employee_id, last_name, salary INTO l_employee FROM omag_employees WHERE employee_id = employee_id_in; END; When this procedure is compiled, PL/SQL looks up the structure of the omag_employees table and defines a record that has a field for each column in the table, with the same name and datatype.

If I want to provide a value for each column in a table that has, say, 500 columns, writing and managing that code can become quite tedious.

Inserting with a record comes in very handy in such a scenario.

Code Listing 1: Insert of a single row with each column specified DECLARE l_employee_id omag_employees.employee_id%TYPE := 500; l_last_name omag_employees.last_name%TYPE := ' Mondrian'; l_salary omag_employees.salary%TYPE := 2000; BEGIN INSERT INTO omag_employees (employee_id, last_name, salary) VALUES ( l_employee_id, l_last_name, l_salary); END; To perform a record-level insert, simply leave off the parentheses around the record in the VALUES clause.

An elegant and simple way to do this in PL/SQL is to take advantage of the cursor FOR loop (which I discussed in part 2 of this PL/SQL 101 series).

The cursor FOR loop is a variation on the numeric FOR loop, which looks like this: The index is implicitly declared by Oracle Database as an integer and can be referenced only inside the body of this loop.

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Let’s look at examples of the ways to populate a record.

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