Question

我是SQL的新手，也是Oracle的初学者，并且很难理解（+）语法。请考虑以下查询：

SELECT *
FROM   CustomerShip,
    (SELECT DISTINCT b.ShipSeq AS shipSeq
     FROM   Orders a,
            CustomerShip b
     WHERE  a.OrderId IN (SELECT OrderId
                          FROM   Orders
                          WHERE  CustomerId = @CustomerId
                          AND    OrderType <> 'A')
     AND    b.CustomerId = @CustomerId
     AND    b.ShipSeq = a.CustShip
     AND    OrderStatus <> 'C'
     GROUP BY b.ShipSeq) i
WHERE  CustomerId = @CustomerId
AND    (Address NOT LIKE '%RETAIL%STORE%')
AND    ShipSeq = i.ShipSeq(+)
ORDER BY ShipTo DESC, OrderDate DESC;

所以我收集Oracle中的（+）是outer join，但我很困惑加入的是什么？内部查询i的结果。我需要为MSSQL重写此查询，并且不确定它会是什么样的？

Answer 1

连接的列就在加号之前。

 ... FROM CustomerShip s LEFT OUTER JOIN (....) i ON s.ShipSeq = i.ShipSeq

Oracle外连接（+）语法

1 个答案: