我一直在尝试在 mysql 中设置触发器,但无济于事。以下是与之相关的表格:
mysql> describe ttloki;
+-------------+-----------+------+-----+-------------------+-----------------------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+-----------+------+-----+-------------------+-----------------------------+
| Lokinumero | int(11) | NO | PRI | NULL | auto_increment |
| Ttnumero | int(11) | NO | MUL | NULL | |
| Kirjausaika | timestamp | NO | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
+-------------+-----------+------+-----+-------------------+-----------------------------+
3 rows in set (0.00 sec)
mysql> describe tyontekija;
+----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+-------------+------+-----+---------+-------+
| Numero | int(11) | NO | PRI | NULL | |
| Sukunimi | varchar(40) | NO | | NULL | |
| Etunimi | varchar(40) | NO | | NULL | |
| Osasto | int(11) | YES | MUL | NULL | |
| Lahios | varchar(40) | YES | | NULL | |
| Postino | varchar(5) | NO | MUL | NULL | |
| Puhelin | varchar(16) | YES | | NULL | |
| Palkka | int(11) | YES | | NULL | |
+----------+-------------+------+-----+---------+-------+
8 rows in set (0.00 sec)
我最后一次试用触发器是这样的:
create trigger uusitt
after insert on TYONTEKIJA
for each row
insert into TTLOKI(Ttnumero) values
(old.TYONTEKIJA.Numero);
每当我尝试插入 TYONTEKIJA 时,它都会给我关于触发器中值的任何错误。
mysql> insert into TYONTEKIJA(Numero,Sukunimi,Etunimi,Osasto,Lahios,Postino,Puhelin,Palkka) values
-> (220000, "Saarikoski", "Pekka", 5, "Umpikuja 1", "02760", "060-7358461", 3000);
ERROR 1054 (42S22): Unknown column 'old.TYONTEKIJA.Numero' in 'field list'
我不明白如何正确设置这种触发器。我应该改变什么来解决这个问题?