在SQL中聯接別名和位置

Question

我正在嘗試運行查詢，我可以在where子句中使用別名

例如：

Select V.Fees - Coalesce(V.Payment,0) - Coalesce (V.Adjustment,0) AS Balance
[
the inner join query for the tables
]
Where A.Order not Null and Balance = 0
Order by Name

但是像往常一樣，它不能在哪里識別余額？

我們該如何解決？

Answer 1

執行您要問的唯一方法是將該字段放在CTE中，並通過CTE的聯接對其進行引用。

Answer 2

您可以在where子句中重復該表達式

Select V.Fees - Coalesce(V.Payment,0) - Coalesce (V.Adjustment,0) AS Balance
[
the inner join query for the tables
]
Where A.Order not Null and (V.Fees - Coalesce(V.Payment,0) - Coalesce (V.Adjustment,0)) = 0
Order by Name