Creating a MySQL trigger to verify data on another table
- by Danny Herran
I am trying to set up a MySQL trigger that does the following:
When someone inserts data into databaseA.bills, it verifies if databaseB.bills already has that row, if it doesn't, then it does an additional insert into databaseB.bills.
Here is what I have:
CREATE TRIGGER ins_bills AFTER INSERT ON databaseA.bills
FOR EACH ROW
BEGIN
IF NOT EXISTS (SELECT 1 FROM databaseB.bills WHERE billNumber=NEW.billNumber) THEN
INSERT INTO databaseB.bills (billNumber) VALUES (NEW.billNumber)
END IF
END;//
DELIMITER ;
The problem is, I can't create it through mysql console or phpMyAdmin. It returns syntax errors near END IF END, and I am sure it's a delimiter problem.
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'END IF END' at line 6
What am I doing wrong?
