Comments on: MySQL Triggers Tutorial

By: Anil

Anil — Mon, 23 Jan 2012 09:03:48 +0000

Hi Sir i have table like Contact
Con_ID CON_Name MMS_ID
1 A MMS001

whan am inserting 2nd record the MMS_ID genrate automatically sequence number Like MMS002
please write a query on Trigger

By: Ashish

Ashish — Mon, 16 Jan 2012 13:06:25 +0000

Hello Sir,
MySelf Ashish from India but last 8 months i was belong from Newyork with my brother.
I want some help about trigger.
First is , I have create php script with database connection and insert some data in first table and another table i was create also.

Plesae tell me how to execute the trigger and can we write in php variable like as $str = “create trigger ….”;

and most important is how to execute it and execute by itself or not ?.

and is it must trigger with mysqli extension ?.

By: sadeek

sadeek — Thu, 06 Oct 2011 06:44:58 +0000

CREATE TRIGGER `test_tbl_before_insert`
BEFORE INSERT ON `MyTable`
FOR EACH ROW
BEGIN

select * from MyTable

END;
mysql version 5.5.8

By: devkbsc

devkbsc — Tue, 28 Jun 2011 09:01:50 +0000

Hello, I have some errors in my syntax trigger. Please help me to fix this error

DELIMITER $$

DROP TRIGGER `trigger_name`$$

create trigger `trigger_name` BEFORE UPDATE on `table_name`
for each row BEGIN
IF OLD.gid NEW.gid THEN
BEGIN
/* Make sure its a group associated with Shopper group – might not be*/
select count(*)
from A_table_name
where acl_group_id = NEW.gid
into @sync_required;

if ( @sync_required >= 1 ) then
BEGIN

/* Verify if the customer acc. already exists in VM’s table */
select count(*)
from A_table_name
where user_id = NEW.id
into @user_acc_exists;

if ( @user_acc_exists = 0 ) THEN
BEGIN

/* Insert new entry into jos_vm_user_info */
INSERT INTO a_table_name
(
user_info_id,
user_id,
address_type,
last_name,
first_name,
address_1,
city,
state,
country,
zip,
user_email,
cdate
)
VALUES(
md5(
date_format(
date_add( sysdate(), INTERVAL FLOOR( 1 + (RAND() * 998)) MICROSECOND),
“%Y%m%d%H%i%s%f”
)
),
NEW.id,
“BT”,
SUBSTRING( NEW.name, (LENGTH( NEW.name ) – LOCATE(‘ ‘, REVERSE( NEW.name ) ) )+2),
left(NEW.name, INSTR(NEW.name,’ ‘)),

NEW.email,
UNIX_TIMESTAMP()
);

/* Insert Entry into a_table_name */
INSERT INTO a_table_name
(
user_id,
vendor_id,
shopper_group_id
)
SELECT NEW.id,
1,
b.vm_shopper_group
FROM a_table_name b
WHERE b.acl_group_id = NEW.gid;
END;
ELSE /* User acc in VM already exists*/
BEGIN
/* Since the customer already exists, we presume entry in
jos_vm_shopper_vendor_xref also exists, so just need to
update to the shopper group associated with the ACL Group
*/

SELECT b.vm_shopper_group
FROM a_table_name b
WHERE b.acl_group_id = NEW.gid
INTO @updated_shopper_group;

UPDATE a_table_name
SET shopper_group_id = @updated_shopper_group
WHERE user_id = NEW.id;

END;
END IF; /* ( @user_acc_exists = 0 ) */
END;
END IF; /* (sync >= 1 ) */
END;
END IF; /* OLD.gid NEW.gid */
END;
$$

DELIMITER ;

By: devkbsc

devkbsc — Tue, 28 Jun 2011 09:00:56 +0000

DELIMITER $$

DROP TRIGGER `trigger_name`$$

if ( @sync_required >= 1 ) then
BEGIN

/* Verify if the customer acc. already exists in VM’s table */
select count(*)
from A_table_name
where user_id = NEW.id
into @user_acc_exists;

if ( @user_acc_exists = 0 ) THEN
BEGIN

NEW.email,
UNIX_TIMESTAMP()
);

SELECT b.vm_shopper_group
FROM a_table_name b
WHERE b.acl_group_id = NEW.gid
INTO @updated_shopper_group;

UPDATE a_table_name
SET shopper_group_id = @updated_shopper_group
WHERE user_id = NEW.id;

END;
END IF; /* ( @user_acc_exists = 0 ) */
END;
END IF; /* (sync >= 1 ) */
END;
END IF; /* OLD.gid NEW.gid */
END;
$$

DELIMITER ;

By: Hrvoje

Hrvoje — Wed, 18 May 2011 22:31:11 +0000

Thank you!

I had my hair being pulled out, and all it was it was a DELIMITER causing a problem!

By: Roberto

Roberto — Mon, 04 Apr 2011 02:08:15 +0000

Hi,
I have a table with 3 fields – 1stname, lastname and fullname. What I want: after the insert of lastname, a trigger to insert in fullname the contents of the first 2 fields.Ex: “John” (f1);”Scott” (f2); trigger – “John Scott” on (f3) automatically. Help please.

By: James

James — Thu, 10 Feb 2011 10:29:19 +0000

A few months late, but answer for posterity…

@Amir

CREATE TRIGGER person_insert AFTER INSERT ON person
FOR EACH ROW BEGIN
INSERT INTO amir_uldap.person (fname,lastname) VALUES (NEW.fname,NEW.lastname);
END

By: Amir

Amir — Mon, 29 Nov 2010 04:16:02 +0000

Hi,
I have two databases called amir_ldap with a table called person and another database called amir_uldap with a table called person.
There tables have only two fields, firstname and lastname.
All I need is that when I add a record into amir_ldap it insert into amir_uldap.person too via a trigger.
I have written this but doesn’t work somehow:

CREATE TRIGGER amir_ldap AFTER INSERT ON amir_ldap.person FOR EACH ROW BEGIN INSERT INTO amir_uldap.person SET firstname = NEW.fname and lastname = NEW.lname;
appreciate your help.

Amir

By: Swapnil

Swapnil — Fri, 19 Nov 2010 17:30:03 +0000

I want to write trigger which will insert data into table2 after getting sqlcode 1062(duplicate entry) while inserting into table1.
I want to write this into mysql.
Please someone guide me.