2个表的sql查询以更新表

Question

我有这些桌子。我想编写更新查询

   CREATE TABLE [dbo].[Feasibility](
[FeasibilityID] [int] IDENTITY(1,1) NOT NULL,
[orderstatus] [varchar](20) COLLATE SQL_Latin1_General_CP1_CI_AS NULL CONSTRAINT [DF_Feasibility_orderstatus]  DEFAULT ('Not Placed')
     CONSTRAINT [PK_Feasibility] PRIMARY KEY CLUSTERED 
     (
[FeasibilityID] ASC
     )WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
     ) ON [PRIMARY]



     CREATE TABLE [dbo].[OrderMaster](
[orderid] [int] IDENTITY(1,1) NOT NULL,
[feasibilityid] [int] NULL,

     CONSTRAINT [PK_OrderMaster] PRIMARY KEY CLUSTERED 
    (
[orderid] ASC
     )WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
     ) ON [PRIMARY]

我想要更新可行性表中存在于ordermaster表中的所有记录的orderstatus为'Closed‘

Answer 1

试试这个。

  update feasibility set orderstatus='Closed' where feasiablityID in(select distinct          
  feasiablityID from ordermaster)

你应该区分关键字来实现高效、快速和无错误的工作..........

Answer 2

最好是使用JOIN语句，而不是IN。它会快得多。你可以在下面试试

UPDATE F
SET    F.OrderStatus = 'closed'
FROM   Feasibility  AS F
JOIN   OrderMaster AS O
ON     F.FeasibilityID = O.FeasibilityID 

Answer 3

使用以下查询

update Feasibility set orderstatus='closed' where 
FeasibilityID in (select feasibilityid from OrderMaster)