sql trigger example
-- SQL Server (update my_table after update on my_table)
CREATE TRIGGER trigger_name ON my_table AFTER UPDATE AS
IF UPDATE (col_name) -- Optional, for particular column
BEGIN
UPDATE my_table SET my_col_date = getdate() FROM my_table
END;
-- Oracle (insert into log table after update on my_table)
CREATE OR REPLACE TRIGGER trigger_name AFTER UPDATE ON my_table
FOR EACH ROW
BEGIN
INSERT INTO my_log_table (LOG_DATE, ACTION) VALUES (SYSDATE, 'Changed');
END;creation d'un trigger sql
CREATE OR REPLACE TRIGGER trigg_example
BEFORE INSERT OR UPDATE ON table_example
FOR EACH ROW
WHEN (new.no_line > 0)
DECLARE
evol_exemple number;
BEGIN
evol_exemple := :new.exemple - :old.exemple;
DBMS_OUTPUT.PUT_LINE(' evolution : ' || evol_exemple);
END;SQL trigger
CREATE TRIGGER [schema_name.]trigger_name
ON table_name
{FOR | AFTER | INSTEAD OF} {[INSERT] [,] [UPDATE] [,] [DELETE]}
AS
{sql_statements}Copyright © 2021 Codeinu
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