I'm looking for the solution to a problem. I have a form that sends two fields (ID, info_data) and I'm trying to add a third field (secuencia) by a trigger but I can not do it.
table, result and expected results
Trigger:
DELIMITER $$
CREATE TRIGGER regi_tg
BEFORE INSERT ON registros
FOR EACH ROW
BEGIN
SET NEW.secuencia = new.id;
END$$
DELIMITER;
PD: I work info_data copy data in secuencia, but not copy the ID achievement in secuencia
Test CODE:
DELIMITER $$
CREATE TRIGGER regi_tg AFTER INSERT ON registros FOR EACH ROW
BEGIN
SET OLD.secuencia = NEW.id;
END;
CREATE TRIGGER regi_tg AFTER UPDATE ON registros FOR EACH ROW
BEGIN
SET OLD.secuencia = NEW.id;
END;
END$$
DELIMITER ;
I use this trigger and it worked, I did recently thought for a while and seeing many post but i dont know if a correct form.enter image description here
Trigger
DELIMITER $$
CREATE TRIGGER regi_tg
BEFORE INSERT ON registros
FOR EACH ROW
BEGIN
SET new.secuencia = md5((SELECT ID FROM registros ORDER BY id DESC LIMIT 1)+1);
END$$
DELIMITER ;
Related
Dummy question: Have the next code in MySQL, but when run it in HeidiSQL, show a sintaxis error near '// CREATE TRIGGER'. I'm not sure if that happen because the trigger doesn't exists. This is the code:
DROP TRIGGER IF EXISTS oportunidades_movimiento_entregado //
CREATE TRIGGER oportunidades_movimiento_entregado;
AFTER INSERT ON historial_entregado
FOR EACH ROW BEGIN
UPDATE oportunidades
SET oportunidades.fechaModificado = NEW.fecha_creacion
WHERE NEW.oportunidad_id = oportunidades.id;
END//
UPDATE
DELIMITER $$
DROP TRIGGER IF EXISTS oportunidades_movimiento_entregado $$
CREATE TRIGGER oportunidades_movimiento_entregado
AFTER INSERT ON historial_entregado
FOR EACH ROW BEGIN
UPDATE oportunidades
SET oportunidades.fechaModificado = NEW.fecha_creacion
WHERE NEW.oportunidad_id = oportunidades.id;
END; $$
DELIMITER //
This works, but now my doubt is... All the code (the DROP and the CREATE) will run everytime, or just the CREATE? I need this because I'm working with 2 tables, in one of them I insert/update the data, after with a trigger insert some of the columns in another table to keep a historial, but when I make a INSERT or UPDATE query in the first table, MySQL display the error #1442
Can't update table oportunidades in stored/function trigger because it's already used by statement which invoked this stored function/trigger.
To get it working, set the delimiter first and reset it after the CREATE TRIGGER statement.
Remove the semicolon at the end of the CREATE TRIGGER line.
This should work:
DELIMITER //
DROP TRIGGER IF EXISTS oportunidades_movimiento_entregado //
CREATE TRIGGER oportunidades_movimiento_entregado -- no trailing semicolon here
AFTER INSERT ON historial_entregado
FOR EACH ROW BEGIN
UPDATE oportunidades
SET oportunidades.fechaModificado = NEW.fecha_creacion
WHERE NEW.oportunidad_id = oportunidades.id;
END//
DELIMITER ;
I am trying to create a trigger for my table named quailmiles. When the total miles hits a certain number I want the persons status (which is a attribute in that same table) to change. For some reason my code is not working.
The error currently reads:
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 9.
delimiter $$
CREATE TRIGGER status_update
AFTER UPDATE ON quailmiles
FOR EACH ROW BEGIN
IF (total_miles > 2000) THEN
UPDATE quailmiles SET status = 'gold';
ELSE IF (total_miles > 4000) THEN
UPDATE quailmiles SET status = 'platinum';
END IF;
END $$
delimiter;
Your logic is backwards. You need to test against 4000 before 2000:
delimiter $$
CREATE TRIGGER status_update
BEFORE UPDATE ON qualmiles
FOR EACH ROW
BEGIN
IF (NEW.total_miles > 4000) THEN
SET NEW.status = 'platinum';
ELSEIF (NEW.total_miles > 2000) THEN
SET NEW.status = 'gold';
END IF;
END $$
delimiter;
I also changed the syntax to be a "before" update trigger. Also, I made the name "qualmiles". "Quailmiles" sounds funny.
I think you want ELSEIF rather than ELSE IF. (Remove the space.)
The error is being returned because that second IF isn't being ended with an END IF.
Also, you don't really want to issue an UPDATE against the same table. You'd rather this be handled in a BEFORE UPDATE trigger, and set the value of the column.
e.g.
CREATE TRIGGER status_update
BEFORE UPDATE ON quailmiles
FOR EACH ROW
BEGIN
IF (NEW.total_miles > 4000) THEN
SET NEW.status = 'platinum';
ELSIF (NEW.total_miles > 2000) THEN
SET NEW.status = 'gold';
END IF;
END$$
I have a data called registration number like follows
COL/A-000001,
KAL/B-000023,
BAL/A-000452,
I know how to validate this type of format using php.But i want to do it when i create the table.IS it possible ?
Try this:
change (example_tbl / field_name) to your (table / field) names respectively.
DELIMITER $$
CREATE TRIGGER example_before_insert
BEFORE INSERT ON example_tbl FOR EACH ROW
BEGIN
IF NEW.field_name NOT_REGEXP '^[A-Z]{3}\/[A-Z]-\d{6}$' THEN
SIGNAL SQLSTATE '45000'
SET MESSAGE_TEXT = 'Cannot add or update row: regex failed';
END IF;
END;
$$
CREATE TRIGGER giveaccess AFTER INSERT ON `befree_user`
FOR EACH ROW BEGIN
INSERT INTO user_access(user_id) VALUES (NEW.user_id);
END;
you need to define another delimiter than ;
delimiter |
CREATE TRIGGER giveaccess AFTER INSERT ON `befree_user`
FOR EACH ROW BEGIN
INSERT INTO user_access(user_id) VALUES (NEW.user_id);
END;
|
delimiter ;
If not the DB thinks that after the first ; the statement is done and will throw an error.
whats wrong with my syntax?
CREATE
TRIGGER db_dhruniversity.trigger1
AFTER INSERT
ON jos_dhruprofile
FOR EACH ROW
BEGIN
UPDATE jos_users
SET jos_users.department = jos_dhruprofile.department
WHERE jos_users.id = jos_dhruprofile.uid
END
The syntax should be as follows:
DELIMITER $$ /* if you're not using an editor, you must change the delimiter*/
CREATE
TRIGGER ai_jos_dhruprofile_each
AFTER INSERT
ON jos_dhruprofile
FOR EACH ROW
BEGIN
UPDATE jos_users
SET jos_users.department = NEW.department
WHERE jos_users.id = NEW.uid; /*<<<--- ; after every stament */
END $$ /* changed delimiter after the end */
DELIMITER ; /*make sure you set the delimiter back to the default*/
Note on the naming scheme for triggers
I'd recommend naming your trigger ai (meaning after insert) so you know when it fires on which table, rather than a meaningless name like: db_dhruniversity.trigger1.
I always use [a/b]+[d/i/u]_tablename_each as the triggername, that way I always know when the triggers fires (before/after) for which event (insert/delete/update) and on which table.
It's also good practise to document that the trigger fires on each row, hence the each on the end of the trigger name.
Note that MySQL does not support triggers that fire once per statement yet (But that might change in future).
There are no delimiters in it:
DELIMITER ||
CREATE
TRIGGER db_dhruniversity.trigger1
AFTER INSERT
ON jos_dhruprofile
FOR EACH ROW
BEGIN
UPDATE jos_users
SET jos_users.department = NEW.department
WHERE jos_users.id = NEW.uid;
END ||
DELIMITER;