使用SQL约束删除数据

Question

我有以下内容：

DELETE FROM ContactBase
DELETE FROM AccountBase

错误：

The DELETE statement conflicted with the REFERENCE constraint "account_primary_contact". The conflict occurred in database "BMBLANK_MSCRM", table "dbo.AccountBase", column 'PrimaryContactId'.
The DELETE statement conflicted with the REFERENCE constraint "account_contacts". The conflict occurred in database "BMBLANK_MSCRM", table "dbo.ContactBase", column 'AccountId'.

我理解，因为我需要以特定顺序删除数据，但如果我将其反转：

DELETE FROM AccountBase
DELETE FROM ContactBase

它只是反转错误消息：

The DELETE statement conflicted with the REFERENCE constraint "account_contacts". The conflict occurred in database "BMBLANK_MSCRM", table "dbo.ContactBase", column 'AccountId'.
The DELETE statement conflicted with the REFERENCE constraint "account_primary_contact". The conflict occurred in database "BMBLANK_MSCRM", table "dbo.AccountBase", column 'PrimaryContactId'.

如何清空这些表？

由于

Answer 1

您可以生成约束的脚本，删除约束，从表中删除，然后使用脚本重新创建约束。

https://jsfiddle.net/DTcHh/21979/

Answer 2

删除约束，然后从表中删除数据。然后，如果需要，再次添加约束。

Answer 3

首先删除约束，删除数据并再次添加：

ALTER TABLE AccountBase
  DROP CONSTRAINT account_contacts;

ALTER TABLE ContactBase
  DROP CONSTRAINT account_primary_contact;

DELETE FROM ContactBase;
DELETE FROM AccountBase;

ALTER TABLE AccountBase
ADD FOREIGN KEY (account_contacts)
REFERENCES ContactBase(PrimaryContactId);

ALTER TABLE ContactBase
ADD FOREIGN KEY (account_primary_contact)
REFERENCES AccountBase(AccountId);

也许我把它们混合在一起，如果没有表DDL的话会让人感到困惑，所以如果我只是调整它。