Oracle trigger where clause updating dating insecure woman
A trigger normally exists in the same database as the table named after the "ON" keyword in the CREATE TRIGGER statement.Except, it is possible to create a TEMP TRIGGER on a table in another database.When defining a TEMP trigger on a non-TEMP table, it is important to specify the database holding the non-TEMP table.CREATE [ OR REPLACE ] TRIGGER trigger_name BEFORE INSERT or UPDATE or DELETE ON table_name [ FOR EACH ROW ] DECLARE -- variable declarations BEGIN -- trigger code EXCEPTION WHEN ...Instead, executing an INSERT, DELETE or UPDATE on the view causes the associated triggers to fire.The real tables underlying the view are not modified (except possibly explicitly, by a trigger program).Note that the sqlite3_changes() and sqlite3_total_changes() interfaces do not count INSTEAD OF trigger firings, but the count_changes pragma does count INSTEAD OF trigger firing.
FOR EACH ROW implies that the SQL statements specified in the trigger may be executed (depending on the WHEN clause) for each database row being inserted, updated or deleted by the statement causing the trigger to fire.
Triggers are automatically dropped when the table that they are associated with (the table-name table) is dropped.
However if the trigger actions reference other tables, the trigger is not dropped or modified if those other tables are dropped or modified.
Both the WHEN clause and the trigger actions may access elements of the row being inserted, deleted or updated using references of the form "NEW.column-name" and "OLD.column-name", where column-name is the name of a column from the table that the trigger is associated with.
OLD and NEW references may only be used in triggers on events for which they are relevant, as follows: If a WHEN clause is supplied, the SQL statements specified are only executed if the WHEN clause is true.