Question

TABLE
: Customer 
KEY
:- CustomerID 
Other
columns: Name, age, etc TABLE
: Customer_address 
Keys
: AddrerssID, CustomerID 
Other
columns: Street, city, STATE, etc

请给我所有客户。如果state = FL，我还想查看客户地址。只创建一个SQL语句。下面的SQL以这种方式启动。请填写其余部分。

Answer 1

SELECT C.CustomerID, C.Name, C.Age, CA.AddressID, CA.Street, CA.City, CA.State
FROM Customer C
LEFT JOIN Customer_Address CA ON C.CustomerID = CA.CustomerID AND CA.State = 'FL'

Answer 2

select Customer.*, 
street, 
city, 
state 
from Customer 
left join Customer_address on Customer.CustomerID = Customer_address.CustomerID 
and Customer_address.STATE = 'FL'

SQL服务器从表中检索数据

2 个答案: