我想运行一个 mysql 触发器来更新表leave_taken
col的值num
,当一个名为的表leave
被更新、插入或删除时。
就像我将这些行插入到leave
:
INSERT INTO `leave` (`id_leave`, `staff_leave_application_id_staff_leave_application`, `staff_leave_application_staff_id_staff`, `leave_type_id_leave_type`, `date`, `active`, `date_updated`) VALUES
(7, 7, 6, 7, '2013-01-21', 1, '2013-01-18'),
(8, 7, 6, 7, '2013-01-22', 1, '2013-01-18'),
(9, 7, 6, 7, '2013-01-23', 1, '2013-01-18'),
(10, 7, 6, 7, '2013-01-24', 1, '2013-01-18'),
(11, 7, 6, 7, '2013-01-25', 2, '2013-01-18');
然后表leave_taken
colnum
值更新为5
:
staff_leave_application_staff_id_staff = currently updated staff_leave_application_staff_id_staff,
and
leave_type_id_leave_type = currently updated leave_type_id_leave_type
我已经包括了下表。
餐桌假
CREATE TABLE IF NOT EXISTS `leave` (
`id_leave` int(11) NOT NULL AUTO_INCREMENT,
`staff_leave_application_id_staff_leave_application` int(11) NOT NULL,
`staff_leave_application_staff_id_staff` int(11) NOT NULL,
`leave_type_id_leave_type` int(11) NOT NULL,
`date` date NOT NULL,
`active` int(11) NOT NULL DEFAULT '1',
`date_updated` date NOT NULL,
PRIMARY KEY (`id_leave`,`staff_leave_application_id_staff_leave_application`,`staff_leave_application_staff_id_staff`),
KEY `fk_table1_leave_type1` (`leave_type_id_leave_type`),
KEY `fk_table1_staff_leave_application1` (`staff_leave_application_id_staff_leave_application`,`staff_leave_application_staff_id_staff`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=12 ;
表请假:
CREATE TABLE IF NOT EXISTS `leave_balance` (
`id_leave_balance` int(11) NOT NULL AUTO_INCREMENT,
`staff_id_staff` int(11) NOT NULL,
`leave_type_id_leave_type` int(11) NOT NULL,
`balance` int(3) NOT NULL,
`date_added` date NOT NULL,
PRIMARY KEY (`id_leave_balance`),
UNIQUE KEY `id_leave_balance_UNIQUE` (`id_leave_balance`),
KEY `fk_leave_balance_staff1` (`staff_id_staff`),
KEY `fk_leave_balance_leave_type1` (`leave_type_id_leave_type`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;