我有一个表,它有一个自动递增的coulmndistributor_warehouse
。我不能在插入第一行后插入行。我也见过类似的查询,但是每个地方都得到了答案,列需要自动递增,这已经在我的数据库中完成了。
mysql> desc distributor_warehouse;
+------------+---------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------+---------------+------+-----+---------+-------+
| dpID | varchar(12) | NO | PRI | | |
| cpID | varchar(12) | YES | | NULL | |
| QTY | int(6) | YES | | NULL | |
| COST_PRICE | decimal(10,2) | YES | | NULL | |
| SELL_PRICE | decimal(10,2) | YES | | NULL | |
+------------+---------------+------+-----+---------+-------+
5 rows in set (0.01 sec)
mysql> select * from distributor_warehouse;
+------+------+------+------------+------------+
| dpID | cpID | QTY | COST_PRICE | SELL_PRICE |
+------+------+------+------------+------------+
| DP1 | CP5 | 10 | 3000.00 | 3100.00 |
+------+------+------+------------+------------+
1 row in set (0.00 sec)
mysql> INSERT INTO distributor_warehouse(cpID,QTY,COST_PRICE,SELL_PRICE) VALUES ('CP6',150,999,1500);
ERROR 1062 (23000): Duplicate entry 'DP1' for key 'PRIMARY'
dpID
通过使用触发器自动递增。这是我的桌子。我成功地插入了第1行,然后在插入第2行时,问题出现了。
mysql> desc autoid;
+-------+---------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+----------------+
| ID | int(10) | NO | PRI | NULL | auto_increment |
+-------+---------+------+-----+---------+----------------+
1 row in set (0.00 sec)
| tg_distributor_warehouse_id | INSERT | distributor_warehouse | BEGIN
INSERT INTO autoid VALUES(NULL);
SET NEW.dpID = CONCAT('DP',LPAD(LAST_INSERT_ID(),1,''));
END |
最佳答案
你的代码看起来很好
drop table if exists t,t1;
create table t(dpid varchar(12), cpid varchar(12), qty int,cost_price decimal(10,2),sell_price decimal(10,2));
create table t1(id int auto_increment primary key);
drop trigger if exists t;
delimiter$$
create trigger t before insert on t
for each row
begin
insert into t1 values (null);
SET NEW.dpID = CONCAT('DP',LPAD(LAST_INSERT_ID(),1,''));
end$$
delimiter;
INSERT INTO t(cpID,QTY,COST_PRICE,SELL_PRICE) VALUES ('CP6',150,999,1500);
INSERT INTO t(cpID,QTY,COST_PRICE,SELL_PRICE) VALUES ('CP6',150,999,1500);
select * from t;
+------+------+------+------------+------------+
| dpid | cpid | qty | cost_price | sell_price |
+------+------+------+------------+------------+
| DP1 | CP6 | 150 | 999.00 | 1500.00 |
| DP2 | CP6 | 150 | 999.00 | 1500.00 |
+------+------+------+------------+------------+
2 rows in set (0.00 sec)
关于mysql - 错误1062(23000):键“PRIMARY”的条目“DP1”重复,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/58281025/