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Oracle PL/SQL for DBAs
book

Oracle PL/SQL for DBAs

by Arup Nanda, Steven Feuerstein
October 2005
Intermediate to advanced content levelIntermediate to advanced
454 pages
14h 44m
English
O'Reilly Media, Inc.
Content preview from Oracle PL/SQL for DBAs

FOR Loop

Oracle offers both numeric and cursor FOR loops . With the numeric FOR loop, you specify the start and end integer values, and PL/SQL does the rest of the work for you, iterating through each intermediate value, and then terminating the loop:

    PROCEDURE display_multiple_years (
       start_year_in IN PLS_INTEGER
      ,end_year_in IN PLS_INTEGER
    )
    IS
    BEGIN
       FOR l_current_year IN start_year_in .. end_year_in
       LOOP
          display_total_sales (l_current_year);
       END LOOP;
    END display_multiple_years;

The cursor FOR loop has the same basic structure, but, in this case, you supply an explicit cursor or SELECT statement in place of the low-high integer range:

    PROCEDURE display_multiple_years (
       start_year_in IN PLS_INTEGER
      ,end_year_in IN PLS_INTEGER
    )
    IS
    BEGIN
       FOR l_current_year IN (
          SELECT * FROM sales_data
           WHERE year BETWEEN start_year_in AND end_year_in)
       LOOP
          -- This procedure is now accepted a record implicitly declared
          -- to be of type sales_data%ROWTYPE...
          display_total_sales (l_current_year);
       END LOOP;
    END display_multiple_years;
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Publisher Resources

ISBN: 0596005873Supplemental ContentErrata Page