I want to wrote a trigger for table users. when new user added, if his Title is IT related, then create a record in IT contact list table.
So I wrote below trigger.
CREATE TRIGGER `test1` INSERT ON `Users` FOR EACH ROW BEGIN
IF INSTR(Title,'IT') > 0
THEN
INSERT INTO IT_contact_list (name,title) value (username,Title);
END IF;
END;
It has error 'unknow column Title in the field list' But it did exist in table Users and IT_contact_list.So what's the issue?Thx.
Fixed and tested in workbench. Try this:
delimiter //
drop trigger if exists test1 //
CREATE TRIGGER `test1` AFTER INSERT ON `Users` FOR EACH ROW BEGIN
IF INSTR(new.Title,'IT') > 0
THEN
INSERT INTO IT_contact_list (name,title) value (new.username,new.Title);
END IF;
END//
insert into Users values('john','HardwareIT');
insert into Users values('bill','Hardware engineer');
select * From IT_contact_list;
--result set:
john HardwareIT
Related
I created a trigger that on a table update inserts row into another table, but one of the values that I pass is getting the old value of the table I am updating.
This is the trigger
DELIMITER $$
CREATE TRIGGER ordersHistory
AFTER UPDATE
ON orders FOR EACH ROW
BEGIN
IF (NEW.status <> OLD.status) THEN
INSERT INTO test (`test`) VALUES (NEW.ourNotes);
INSERT INTO test (`test`) VALUES (OLD.ourNotes);
END IF;
END $$
This insert at the table exactly the same thing.(the old value of ourNotes)
Creating a trigger is not working as expected, whenever I try to insert data into master table it give me error that count does't match. I am unable to identify where I'm doing wrong.
I have attached error image please look for further demonstration
DELIMITER $$
DROP TRIGGER IF EXISTS `trg_apl_b_info_after_insert`
CREATE
TRIGGER `trg_apl_b_info_after_insert` AFTER INSERT ON `tbl_appli_basic_info`
FOR EACH ROW BEGIN
DECLARE vApplicant VARCHAR(256);
-- Find appli_basic_info_id & apli_reg_no of Applicant performing the INSERT into table
SELECT USER() INTO vApplicant;
-- Insert record into tbl_appli_basic_info_after_insert table
INSERT INTO tbl_appli_basic_info_after_insert
( appli_basic_info_id,
apli_reg_no,
full_name,
after_insert_datetime)
VALUES
( NEW.appli_basic_info_id,
NEW.apli_reg_no,
NEW.full_name,
SYSDATE(),
vApplicant );
END;
$$
DELIMITER ;
Error in phpMyAdmin
Your insert statement lists 4 fields however you provided 5 values. Hence count not matched.
What is the error in the following code. I am executing in mysql
CREATE TRIGGER tg_order_insert
BEFORE INSERT
ON `order` FOR EACH ROW
BEGIN
INSERT INTO `grocery`.`order_seqid` VALUE(NULL);
SET NEW.order_id = CONCAT('#GNC', LPAD(LAST_INSERT_ID(),3,'0'));
END;
Grocery is the database and order_seqid and order are 2 table.
order_seqid is a table with only 1 attribute if type int and auto increment.
Am trying to put a prefix on the id which we insert into order table.
I am getting 2 errors in INSERT INTO..... and END; line
Did you declare a delimiter before your trigger definition? Something like
DELIMITER //
CREATE TRIGGER tg_order_insert
BEFORE INSERT
ON `order` FOR EACH ROW
BEGIN
INSERT INTO `grocery`.`order_seqid` VALUE(NULL);
SET NEW.order_id = CONCAT('#GNC', LPAD(LAST_INSERT_ID(),3,'0'));
END
//
Because if you don't, then MySQL thinks you're trying to end your trigger definition when it sees that first ; and calls syntax error.
i have 4 columns in my table, vrms,irms,total,id.
i have created a trigger where i want to insert the result of the trigger in another table.
my code:
CREATE TRIGGER total_sum BEFORE INSERT ON meter5
FOR EACH ROW BEGIN
INSERT INTO hourly
SELECT vrms,irms,id,
NEW.irms * NEW.vrms AS total;
END
error:
not allowed to return a resultset from a trigger in mysql.
You need the trigger to be after insert something as
delimiter //
create trigger total_sum after insert on meter5
for each row
begin
insert into hourly (id,vrms,irms,total) values (new.id,new.vrms,new.irms,new.vrms*new.irms);
end ; //
delimiter ;
I'm trying to create a trigger, however I keep getting back a syntax error.
Here's the statement:
DELIMITER $$
CREATE TRIGGER `swtalentbank`.`after_candidate_insert`
AFTER INSERT ON `Candidates` FOR EACH ROW
BEGIN
INSERT INTO useradmin (username, talent)
VALUES (NEW.email, 1);
UPDATE `Candidates` SET UserID = useradmin.userid where useradmin.username = NEW.email;
END
DELIMITER ;
I have a registration form on my site. When a person registers it populates the Candidates table with their profile information.
In the Candidates table, there are various fields, two of them being 'email' and 'UserID'.
UserID is also the PK in 'useradmin', so I'm linking the two up.
So when a user registers, I need to insert a record into 'useradmin' with the email address that's just been used to register, and then update the 'Candidates' table, with UserID that's just been created in 'useradmin'.
I hope this makes sense?
NB. I am changing the delimiter before running the statement.
Besides properly using DELIMITER when creating a trigger you have at least two fundamental issues with your current code:
In MySQL you can't use issue a DML statement (in your case UPDATE) against a table (candidates) on which you defined a trigger (also candidates). Your only option is to use BEFORE trigger and set a value of userid column of a row being inserted to a proper value.
You can't arbitrarily reference a column (useradmin.userid) of a table out of the context like you did in your UPDATE. You didn't joined useradmin table or used it in a subquery.
That being said and assuming that userid in useradmin table is an auto_increment column your trigger might look like this
DELIMITER $$
CREATE TRIGGER after_candidate_insert
BEFORE INSERT ON candidates
FOR EACH ROW
BEGIN
INSERT INTO useradmin (`username`, `talent`) VALUES (NEW.email, 1);
SET NEW.userid = LAST_INSERT_ID();
END$$
DELIMITER ;
Here is SQLFiddle demo
You should use semicolon after end your insert query.
You can use INSERT ... ON DUPLICATE KEY UPDATE syntax for your purpose
try out this...
DELIMITER $$
CREATE TRIGGER `swtalentbank`.`after_candidate_insert`
AFTER INSERT ON `Candidates` FOR EACH ROW
BEGIN
INSERT INTO useradmin (username, talent)
VALUES (NEW.email, 1);
UPDATE `Candidates` SET UserID = useradmin.userid where useradmin.username = NEW.email;
END $$
DELIMITER ;