SQL Server 从两个表插入更新

Question

我有 2 个表格 Winner 和 player ，包含标准信息（姓氏、名字、ID ...）加上两个布尔列 Validity 和 WinnerState（默认为 0）。

我想做的是创建一个 SQL Server 过程，该过程将从玩家表中随机选择一条记录，然后将其插入到获胜者表中，并同时更新玩家表中选择的记录的获胜者状态列。

Winner 表包含一个指向 Player 的外键，用于跟踪所选玩家。

我已经尝试过一个程序，但它会为所有玩家表更新此列：

create procedure selectUpdate
    As
    insert into Winner (Fname,Lname,Adress,City,Tel,Player_ID) from
    select TOP 1 (Fname,Lname,Adress,City,Tel,ID) from Player order by NEWID()
    Update Player
    SET WinnerState=1

我怎样才能让它只更新随机选择的记录？谢谢！

Answer 1

您可以在一个语句中完成所有操作：

create procedure selectUpdate
as
begin
    set nocount on

    ;with p as (
       select top 1 Fname,Lname,Adress,City,Tel,ID,WinnerState
       from Player
       where WinnerState = 0 -- this is necessary I assume
       order by checksum(NEWID())
    )
    update p
    set WinnerState = 1
    output
        inserted.Fname,
        inserted.Lname,
        inserted.Adress,
        inserted.City,
        inserted.Tel,
        inserted.ID into Winner (Fname,Lname,Adress,City,Tel,Player_ID)
end

Answer 2

假设 ID 是一个 INT 并且是 Player 表的主键：

DECLARE @id INT

SELECT TOP 1 @id = ID FROM Player ORDER BY NEWID()

insert into Winner (Fname,Lname,Adress,City,Tel,Player_ID) from
select Fname,Lname,Adress,City,Tel,ID from Player WHERE ID = @id

Update Player
SET WinnerState=1 WHERE ID = @id