刪除相關記錄

Question

我正在嘗試編寫一個刪除相關記錄的存儲過程 。 如果您看下面的圖片，您將看到一個攤位如何具有攤位類型和大廳，以及攤位類型如何具有productid ，然后將其包含在產品表中。

本質上，我要刪除一個大廳，這也意味着要刪除展位，展位類型和展位類型的產品。

我什至不知道從哪里開始，因為我是sql的新手，所以任何指導或鏈接都值得贊賞。

Answer 1

如果您在表DDL上設置了級聯刪除，那么如果您在父表上刪除，則刪除將級聯到子表及其子級遞歸。

更多信息： http : //www.techonthenet.com/sql_server/foreign_keys/foreign_delete.php

要從每個表中手動刪除，您需要從依賴度最低的表到依賴度最高的表中刪除，從子級刪除到父級刪除，並使用聯接來幫助。

Answer 2

因此，我最終按照@TheMadDBA的建議使用了join和DELETE FROM，因此為他/她提供了支持。 始於唯有依靠

USE [DB]
GO
/****** Object:  StoredProcedure [Exhibit].[DeleteHallAndRelatedData]    Script Date: 7/7/2015 2:30:42 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO


----------------------  DeleteHallAndRelatedData ----------------------------------------------------------------------------
ALTER PROC [Exhibit].[DeleteHallAndRelatedData]
    @OwnerId UniqueIdentifier,
    @HallId UniqueIdentifier    
AS
-----------------------------------------------------------------------------------------------------
SET NOCOUNT ON

Print N'DELETING PRICE SPLITS'

delete spl from 
Shopping.PriceSplit spl
join Shopping.Price prc on prc.id=spl.priceId
join Shopping.Product prd on prd.Id = prc.ProductId
join Exhibit.BoothType bt on bt.BoothTypeProductId=prd.Id
Join Exhibit.Booth b on b.BoothTypeId=bt.BoothTypeProductId
where
b.HallId= @HallId and b.OwnerId = @OwnerId

Print N'DELETING PRICES'
delete prc from 
Shopping.Price prc
join Shopping.Product prd on prd.Id = prc.ProductId
join Exhibit.BoothType bt on bt.BoothTypeProductId=prd.Id
Join Exhibit.Booth b on b.BoothTypeId=bt.BoothTypeProductId
where
b.HallId= @HallId and b.OwnerId = @OwnerId

Print N'DELETING PRODUCTS'
delete prd from 
Shopping.Product prd
join Exhibit.BoothType bt on bt.BoothTypeProductId=prd.Id
Join Exhibit.Booth b on b.BoothTypeId=bt.BoothTypeProductId
where
b.HallId= @HallId and b.OwnerId = @OwnerId

Print N'DELETING BOOTH TYPES'
delete bt from
Exhibit.BoothType bt
Join Exhibit.Booth b on b.BoothTypeId=bt.BoothTypeProductId
where
b.HallId= @HallId and b.OwnerId = @OwnerId

Print N'DELETING BOOTHS'
delete from Exhibit.Booth where HallId = @HallId

Print N'DELETING HALL'
delete from Exhibit.Hall where Id = @HallId