who is danielle guizio dating - Update trigger in oracle on updating a column
A trigger is a set of actions that are run automatically when a specified change operation (SQL INSERT, UPDATE, or DELETE statement) is performed on a specified table.
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Harvinder Rather than updating the row, use a BEFORE ROW trigger simply to set the column value in the trigger - it will get applied when the update is processed.
See examples in docs, eg: CREATE OR REPLACE TRIGGER emp_sal_trg BEFORE UPDATE ON emp FOR EACH ROW BEGIN IF : NEW.
Implementation of SQL triggers is based on the SQL standard.
It supports constructs that are common to most programming languages.
For simplicity, consider the following common scenario: An i Series has multiple item tables holding data related in a one-to-one relationship.