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if inserting then INSERT INTO SRC_TBL (CFG_NAME, CFG_VALUE) VALUES(: NEW. CFG_VALUE); elsif updating then UPDATE SRC_TBL SET CFG_VALUE = : NEW.
You might be unaware that a trigger is executing unless it causes an error that is not handled properly. A trigger defined on a schema fires for each event associated with the owner of the schema (the current user).While a trigger is , which determines whether the trigger fires before or after the triggering statement runs and whether it fires for each row that the triggering statement affects. If the trigger is created on a schema or the database, then the triggering event is composed of either DDL or database operation statements, and the trigger is called a )".By default, a trigger is created in the enabled state. When a trigger fires, tables that the trigger references might be undergoing changes made by SQL statements in other users' transactions.Constraints are easier to write and less error-prone than triggers that enforce the same rules.However, triggers can enforce some complex business rules that constraints cannot.
PUT_LINE('Difference: ' || sal_diff); END; / Whalen: Old salary = 2800, New salary = 2940, Difference: 140 Hartstein: Old salary = 13000, New salary = 13650, Difference: 650 Fay: Old salary = 6000, New salary = 6300, Difference: 300 Kochhar: Old salary = 17000, New salary = 17850, Difference: 850 De Haan: Old salary = 17000, New salary = 17850, Difference: 850 INSERT INTO tab1 VALUES ('Some text.'); CREATE OR REPLACE TRIGGER trg1 BEFORE UPDATE ON tab1 FOR EACH ROW BEGIN DBMS_OUTPUT.