Oracle updating records within same cursorr_name.last_name ); END; / SET serveroutput ON SIZE 1000000; DECLARE TYPE t_name IS RECORD( first_name employees.first_name%TYPE, last_name employees.last_name%TYPE ); r_name t_name; r_name2 t_name; r_name_null t_name; n_emp_id employees.employee_id%TYPE := 200; BEGIN -- assign employee's infomation to record SELECT first_name, last_name INTO r_name FROM employees WHERE employee_id = n_emp_id; -- assign record to another record r_name2 := r_name; -- print out the employee's name DBMS_OUTPUT.
In the declaration section below, I have created one record type that holds the different numeric elements that make up a telephone number.
I then create another record to hold the various telephone numbers for a salesperson: DECLARE TYPE phone_rt IS RECORD ( area_code PLS_INTEGER, exchange PLS_INTEGER, phn_number PLS_INTEGER, extension PLS_INTEGER ); TYPE contact_rt IS RECORD ( day_phone# phone_rt, eve_phone# phone_rt, cell_phone# phone_rt ); l_sales_rep contact_rt; Composite Datatypes to the Rescue!
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.
Listing 1 demonstrates an insert of a single row into the omag_employees table that specifies each column individually.
Populating Records with Data Most of the time when you work with records, you will be assigning a row from a table to a record.PL/SQL’s support for records, one of several composite datatypes, enables you to write code that is simple, clean, and easy to maintain.Rather than work with long lists of variables or parameters, you can work with a record that all that information.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.A cursor FOR loop has a similar structure but replaces a numeric range with a query: loop index as well, but in the case of a cursor FOR loop, it declares the index as a record by using %ROWTYPE against the query in the loop header.