1.删除某一数据库中所有外键约束

declare @sql varchar(max),  
 @tab_name varchar(128),  
 @fk_name varchar(128);  
declare c cursor for  
select OBJECT_NAME(parent_object_id), name from sys.objects where type='F'  
  
open c  
fetch next from c into @tab_name, @fk_name   
while @@FETCH_STATUS=0  
begin   
 set @sql='';  
 set @sql='alter table ' + @tab_name + ' drop constraint ' + @fk_name  
 print @sql  
 exec(@sql)  
   
 fetch next from c into @tab_name, @fk_name  
end  
close c  
deallocate c 

2. 删除某一数据时提示“该数据库正在使用中”

use master   
go  
      
declare @dbname sysname   
set @dbname = 'BigValuesTest' --这个是要删除的数据库库名   
      
declare @s nvarchar(1000)   
declare tb cursor local  
for 
    select s = 'kill   ' + cast(spid as varchar) 
    from   master.dbo.sysprocesses 
    where  dbid = DB_ID(@dbname)   
      
open   tb     
fetch   next   from   tb   into   @s   
while @@fetch_status = 0 
begin 
    exec (@s)  
    fetch next from tb into @s 
end   
close   tb   
deallocate   tb   
   
exec ('drop   database   [' + @dbname + ']')  

参考文献

无法删除数据库，因为该数据库当前正在使用"问题解决

SQLServer删除所有外键