Question

我正在使用SupplierA中的详细信息更新SupplierB。

SupplierB包含供应商提供的每个订单，但是，当我插入SupplierA时，我只想为每个供应商添加一个实例，因此 most recent 与订单相关的日期。

目前我正在做这样的事情;

UPDATE SupplierA
SET LastSupplyDate = (SELECT [DATE] FROM SupplierB AS SB WHERE SB.Supplier COLLATE DATABASE_DEFAULT = SupplierA.SupNumber COLLATE DATABASE_DEFAULT)
WHERE [Site] = 2

显然这会返回多个值，如何获得最新值，MAX()是一个选项？我很欣赏任何想法/想法吗？

Answer 1

SET LastSupplyDate = (SELECT MAX([DATE])...

Answer 2

UPDATE SupplierA SET LastSupplyDate =   
(  
  SELECT TOP 1 [DATE] FROM SupplierB AS SB  
  WHERE SB.Supplier
  COLLATE DATABASE_DEFAULT = SupplierA.SupNumber COLLATE DATABASE_DEFAULT 
  ORDER BY [DATE] DESC


) 
WHERE [Site] = 2

Answer 3

UPDATE SupplierA
SET LastSupplyDate = (SELECT MAX([DATE]) FROM SupplierB AS SB WHERE SB.Supplier COLLATE DATABASE_DEFAULT = SupplierA.SupNumber COLLATE DATABASE_DEFAULT)
WHERE [Site] = 2

从另一个表更新表，选择最近的＆＃39;日期＆＃39;对于每个供应商

3 个答案: