before_vs_after.sql

OReilly Oracle PL SQL Programming第4版源代码

/*-- before_vs_after.sql */
-- a before statement level trigger
CREATE OR REPLACE TRIGGER before_statement_trigger
BEFORE INSERT ON to_table
BEGIN
  DBMS_OUTPUT.PUT_LINE('Before Insert Statement Level');
END;
/

-- a before row level trigger
CREATE OR REPLACE TRIGGER before_row_trigger
BEFORE INSERT ON to_table
FOR EACH ROW
BEGIN
  DBMS_OUTPUT.PUT_LINE('Before Insert Row Level');
END;
/


/*======================================================================
| Supplement to the third edition of Oracle PL/SQL Programming by Steven
| Feuerstein with Bill Pribyl, Copyright (c) 1997-2002 O'Reilly &
| Associates, Inc. To submit corrections or find more code samples visit
| http://www.oreilly.com/catalog/oraclep3/
*/