Pl sql if inserting updating tahyna tozzi dating


14-Dec-2020 00:27

A trigger is fired based on a triggering statement, which specifies: statement might include a list of columns. Deptno) AS Amp_list_ Emplist FROM Dept_tab d; The statement level triggers are useful for performing validation checks for the entire statement.If a triggering statement includes a column list, the trigger is fired only when one of the specified columns is updated. Optionally, a trigger restriction can be included in the definition of a row trigger by specifying a Boolean SQL expression in a procedure can be either a PL/SQL or a Java procedure that is encapsulated in a PL/SQL wrapper. CREATED_DATE); END; --Inserting values INSERT INTO BANK_TRANSACTIONS values ('1','TXN1234','Peter Thomas','12-MAY-2017','HR',sysdate); INSERT INTO BANK_TRANSACTIONS values ('2','TXN9999','Jemes Patel','10-JUN-2016','HR',sysdate); select * from BANK_TRANSACTIONS; --updating values. This statement can be used with any interactive tool, such as SQL*Plus or Enterprise Manager.IF (TG_OP = 'DELETE') THEN delta_time_key = OLD.time_key; delta_amount_sold = -1 * OLD.amount_sold; delta_units_sold = -1 * OLD.units_sold; delta_amount_cost = -1 * OLD.amount_cost; ELSIF (TG_OP = 'UPDATE') THEN -- forbid updates that change the time_key - -- (probably not too onerous, as DELETE INSERT is how most -- changes will be made). = NEW.time_key) THEN RAISE EXCEPTION 'Update of time_key : % - % not allowed', OLD.time_key, NEW.time_key; END IF; delta_time_key = OLD.time_key; delta_amount_sold = NEW.amount_sold - OLD.amount_sold; delta_units_sold = NEW.units_sold - OLD.units_sold; delta_amount_cost = NEW.amount_cost - OLD.amount_cost; ELSIF (TG_OP = 'INSERT') THEN delta_time_key = NEW.time_key; delta_amount_sold = NEW.amount_sold; delta_units_sold = NEW.units_sold; delta_amount_cost = NEW.amount_cost; END IF; -- Insert or update the summary row with the new values.

pl sql if inserting updating-33

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And it checks that an employee's name is given and that the salary is a positive value.Trigger names do not need to be unique with respect to other schema objects, such as tables, views, and procedures.



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