事务的数据一致性测试

begin tran
declare @num int
set @num =0
while @num<500000
begin
update wcode set password ='a' + CAST (@num as nvarchar(50)) where wcode ='9998'
set @num =@num +1
end
commit tran

 

 

 

另外一个查询

 

select wcode ,password from wcode where wcode ='9998'