删除相关记录

Question

我正在尝试编写一个删除相关记录的存储过程。如果您查看下面的图像，您将看到展位如何具有展位类型和展厅，展位类型具有productid，然后将其包含在产品表中。

基本上，我试图删除一个大厅，这意味着还要删除展位，展位类型和展位类型的产品。

我甚至不知道从哪里开始，因为我对sql很新，所以任何指导或链接都会受到赞赏。

Answer 1

如果您在表DDL上设置了删除设置级别，那么如果您在父表上删除，则删除将级联到子表及其子项递归。

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

要从每个表中进行manaully删除，您需要从最少的表中删除，从子项删除到父项，使用联接来帮助。

Answer 2

所以我最终按照@TheMadDBA的建议使用了连接和DELETE FROM，以便为他/她提供这个想法。最开始依赖于最依赖的

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