我尝试在将值插入表ec3_checking
之前设置触发器,触发器的功能设置为' account_id'到' CH-n'如果id_count的最高值是(n-1),则id_count是auto_increment参数。
delimiter //
CREATE TRIGGER account_id_add BEFORE INSERT ON `ec3_checking`
FOR EACH ROW
BEGIN
DECLARE anum int;
DECLARE bnum int;
SET bnum = max(id_account);
SET anum = bnum + 1;
SET NEW.account_id = concat('CH-', anum);
END//
然后我尝试在表格中插入一些值
insert into `ec3_checking` (balance, overdraft_limit)
VALUES
('300','50');
有一个错误:1111,无效使用群组功能,有人可以帮帮我吗? 非常感谢你。
答案 0 :(得分:0)
CREATE TRIGGER `account_id_add` BEFORE INSERT ON `ec3_checking`
FOR EACH ROW BEGIN
DECLARE anum int;
SET @bnum = (SELECT max(id_account) FROM ec3_checking);
SET anum = @bnum + 1;
SET NEW.account_name = concat('CH-', anum);
END