Microsoft SQL Server 2012：如何將記錄插入關系表

Question

有沒有辦法將記錄插入關系表，而不是為每個表運行查詢？

我需要插入一個新日志：l_WinUser，l_Status，t_StartTime，t_StartDate，其中username = username，g_Exe = g_Exe

如果是這樣在.NET中有一種方法來獲取插入的記錄ID？ 目前我正在執行另一個查詢來檢索插入的日志（工作正常）：

SELECT TOP (1) Logs.l_LogID 
FROM Logs 
INNER JOIN Game ON Logs.g_GameID = Game.g_GameID 
INNER JOIN Member ON Logs.m_MemberID = Member.m_MemberID 
WHERE (Game.g_Exe = @exe) 
AND (Member.m_Username = @username) 
AND (Logs.l_WinUser = @winUser)
ORDER BY Logs.l_LogID DESC

這是ERD：

非常感謝。

Answer 1

您可以創建一個VIEW，一個INSTEAD OF INSERT觸發器並對其運行一個INSERT -Statement。

create View View_Logs 
as
select l_WinUser, 
       l_Status, 
       t_StartTime, 
       1t_StartDate,
       username,
       g_Exe
FROM Logs 
INNER JOIN Game ON Logs.g_GameID = Game.g_GameID 
INNER JOIN Member ON Logs.m_MemberID = Member.m_MemberID 

現在你插入這樣的新條目

insert into View_logs
  (l_WinUser,l_status, lt_StartDate,username,g_exe)
values
  ('Foo', 1, GetDate(),'BarUser','SomeEXE')

您將使用新的l_LogID

select SCOPE_IDENTITY()

注意：在第一次嘗試中我寫了一個針對視圖的INSERT也會插入/更新相關表，但這不是真的。 所以我糾正了這個答案。

這是觸發器（未經測試）：

create trigger YourTriggerName on View_ogs
for instead of insert 
as
declare @GameID int, @MemberID int, @timeKey int

select @GameID=g_GameID from Game g join inserted i on g.g_Exe = i.g_exe
if @GameID is null begin
  insert into Game (g_exe) select g_exe from Inserted
  select @GameID = SCOPE_IDENTITY()
  end

select @MemberID=m.m_memberID from Member m join inserted i on m_username = i.username
if @MemberID is null begin
  insert into Member (m_username) select username from Inserted
  select @MemberID = SCOPE_IDENTITY()
  end

select @timeKey=t.t_timeKey 
from Time_Date t 
     join inserted i 
       on t.t_StartTime=i.t_StartTime 
      and t.t_StartDate = t_StartDate

if @timeKey is null begin
  insert into Time_Date (t_StartTime, t_StartDate) select t_StartTime, t_StartDate from Inserted
  select @timeKey = SCOPE_IDENTITY()
  end

set nocount off
insert into Logs
  (l_WinUser, l_Status, m_MemberID, g_GameID, t_TimeKey)
  select l_WinUser, l_Status, @MemberID, @GameID, @timekey)