我的 Oracle 数据库中有两个表。
第一张桌子是(客户)-
customer_id Customer_name Customer_age Customer_address salary
103 Giriraj Rathi 22 Kolkata 12000
100 Subir Adhikari 22 Bolpur 10000
101 Rakesh Chatterjee 21 Tarkeshwar 8000
102 Jayanta Patra 20 Tarkeshwar 9000
104 Abhi Karmakar 22 Burdwan 8000
105 Mainak Manna 21 Burdwan 9000
106 Subho Gupta 20 Kolkata 10000
107 Aritra Das 23 Kolkata 7000
108 Pradip Paul 22 Kolkata 5000
109 Sourav Banerjee 22 Bolpur 9000
第二张表是(订单):
Order_id Order_date customer_id amount
200 12-03-13 100 1100
201 09-05-13 101 1400
202 07-04-12 103 2500
204 29-05-13 104 2400
203 09-02-13 105 9000
205 18-06-13 106 2100
206 09-07-13 107 1600
207 18-05-13 108 2900
209 18-04-13 109 2400
现在我想加入这两个表。所以我使用了查询:
select customer_id,
customer_name,
customer_address,
order_id,order_date,
amount
from customers,
orders
where customers.customer_id=orders.customer_id;
我用谷歌搜索了这个错误,发现当 SQL 代码本身存在歧义时会发生这种情况,但在这种情况下,我什么也看不到。