CREATE trigger SQL
-- Oracle DB Syntax
CREATE OR REPLACE TRIGGER {trigger_name}
BEFORE | AFTER
INSERT | UPDATE | DELETE
ON {table_name}
(FOR EACH ROW)
{operation to be executed}
-- for example
CREATE TRIGGER log_updates
AFTER INSERT OR UPDATE ON Person
FOR EACH ROW
INSERT INTO LogPerson(ts, IdPerson, surname)
VALUES(CURRENT_TIMESTAMP, NEW.id, NEW.surname);what is a trigger in sql
-- Azure SQL Database Syntax
-- Trigger on an INSERT, UPDATE, or DELETE statement to a table or view (DML Trigger)
CREATE [ OR ALTER ] TRIGGER [ schema_name . ]trigger_name
ON { table | view }
[ WITH <dml_trigger_option> [ ,...n ] ]
{ FOR | AFTER | INSTEAD OF }
{ [ INSERT ] [ , ] [ UPDATE ] [ , ] [ DELETE ] }
AS { sql_statement [ ; ] [ ,...n ] [ ; ] > }
<dml_trigger_option> ::=
[ EXECUTE AS Clause ]Copyright © 2021 Codeinu
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