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Oracle PL/SQL Language Pocket Reference, 4th Edition
book

Oracle PL/SQL Language Pocket Reference, 4th Edition

by Steven Feuerstein, Bill Pribyl, Chip Dawes
October 2007
Intermediate to advanced content levelIntermediate to advanced
178 pages
2h 50m
English
O'Reilly Media, Inc.
Content preview from Oracle PL/SQL Language Pocket Reference, 4th Edition

Records in PL/SQL

A PL/SQL record is a data structure composed of multiple pieces of information called fields. To use a record, you must first define it and declare a variable of this type. There are three types of records: table-based, cursor-based, and programmer-defined.

Declaring Records

Define and declare records either in the declaration section of a PL/SQL block or globally, via a package specification.

You do not have to explicitly define table-based or cursor-based records, as they are implicitly defined with the same structure as a table or a cursor. Variables of these types are declared via the %ROWTYPE attribute. The record’s fields correspond to the table’s columns or the columns in the SELECT list. For example:

DECLARE
   -- Declare table-based record for company table.
   comp_rec  company%ROWTYPE

   CURSOR comp_summary_cur IS
      SELECT c.company_id,SUM(s.gross_sales) gross
        FROM company c ,sales s
       WHERE c.company_id = s.company_id;

   -- Declare a cursor-based record.
   comp_summary_rec  comp_summary_cur%ROWTYPE;

Programmer-defined records must be explicitly defined with the TYPE statement in the PL/SQL declaration section or in a package specification. Variables of this type then can be declared as shown here:

DECLARE TYPE name_rectype IS RECORD( prefix VARCHAR2(15) ,first_name VARCHAR2(30) ,middle_name VARCHAR2(30) ,sur_name VARCHAR2(30) ,suffix VARCHAR2(10) ); TYPE employee_rectype IS RECORD ( emp_id NUMBER(10) NOT NULL ,mgr_id NUMBER(10) ,dept_no dept.deptno%TYPE ,title VARCHAR2(20) ...
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Publisher Resources

ISBN: 9780596514044Errata Page