添加sql语句执行测试

declare   @a   int  
  set   @a=0  
  while   @a<10  
  begin  
   declare @time datetime
   set @time=getdate()
    
    select count(*) from test left join t1 on t1.id = test.id

   insert into time values (datediff(ms,@time,getdate()))
  set @a=@a+1;
 end