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Is it possible to create multiple trigger on a table?
SQL Server allows multiple triggers on the table for the same event and there is no defined order of execution of these triggers. There can be only one first or last trigger for each statement on a table. Below is the sample syntax for setting the order of trigger to first for the INSERT statement.
What is the value of trigger old in before insert?
For an INSERT trigger, OLD contains no values, and NEW contains the new values. For an UPDATE trigger, OLD contains the old values, and NEW contains the new values. For a DELETE trigger, OLD contains the old values, and NEW contains no values.
Can we use trigger old in before update?
old won’t hold the newly updated field by the workflow after the update. However, if we proceed to manually edit the record, the trigger will fire again (and this is viewed as a new “update transaction”). Trigger. old will hold the field that was updated on the previous transaction by the workflow rule.
How to create triggers that update the same table?
I have just started using triggers and one thing that I would need to do is to create a trigger that updates the same table that’s inserting the row.
When to use after update trigger in SQL Server?
I have a table with 4 columns qty, qtydiff, price and value. I want a after update trigger that fires when qty row values change (more than one rows).
How to create trigger to update country before insert?
DELIMITER $$ CREATE TRIGGER `populate_country_id` BEFORE INSERT ON `city` FOR EACH ROW BEGIN IF NEW.country_id = 0 THEN UPDATE city INNER JOIN country B ON city.country = B.country SET NEW.country_id = B.country_id; END IF; END $$ DELIMITER ;
How to create a trigger after insert in MySQL?
DELIMITER $$ DROP TRIGGER IF EXISTS `setEditStatus`$$ CREATE TRIGGER `setEditStatus` AFTER INSERT on ACCOUNTS FOR EACH ROW BEGIN update ACCOUNTS set status=’E’ where ACCOUNTS.pk = NEW.edit_on ; END$$ DELIMITER ; The requirement is NOT that I manipulate the newly inserted column, but an already existing column with pk = NEW.edit_on