SQL Server刪除表

Question

如果您在SQL Server中刪除了一個包含Keys，Indexes，Contraints等的表，它是否也會刪除這些表？我只是想知道，如果我需要爲所有這些創建刪除腳本，或者如果我可以簡單地刪除這些表，我何時構建腳本？

感謝，

小號

Answer 1

是的，雖然你不能刪除由另一個表的外鍵引用的表。

這裏有一個程序丟棄與引用它的SQL Server 2008中的外鍵的表：

create table TA (AID int identity(1, 1), OtherId int, Name varchar(512), constraint PK_TA primary key (AID)) 
create table TB (BID int identity(1, 1), OtherId int, Name varchar(512), constraint PK_TB primary key (BID)) 
alter table TA add constraint FK_TA_TB foreign key (OtherId) references TB (BID) 
alter table TB add constraint FK_TB_TA foreign key (OtherId) references TA (AID) 

drop table ta -- doesn't work 
drop table tb -- doesn't work 

create procedure my_DropTable @tableName varchar(512) as 
begin 
    if OBJECT_ID(@tableName) is null begin print 'OBJECT DOES NOT EXIST' return end 
    declare @sql nvarchar(max) 
    while exists (select * from sys.foreign_keys where referenced_object_id = object_id(@tableName)) 
    begin 
     select @sql = 'ALTER TABLE ' + OBJECT_NAME(parent_object_id) + ' DROP CONSTRAINT ' + OBJECT_NAME(object_id) 
     from sys.foreign_keys where referenced_object_id = object_id(@tableName) 

     exec sp_executesql @sql 
    end 
    set @sql = 'DROP TABLE ' + @tableName 
    exec sp_executesql @sql 
end 

exec my_DropTable 'TA' 
exec my_DropTable 'TB'