/****** 第一种解决方案：锁+事务 保证原子性 ******/
begin transaction;
declare @sn bigint;
select top 0 id from IDS with (tablockx);
set @sn=isnull(IDENT_CURRENT('IDS'),IDENT_INCR('IDS')) + {0};
DBCC CHECKIDENT ('IDS', RESEED, @sn);
commit transaction;
select @sn
/****** 第二种解决方案：未测试 可能缺乏原子性 ******/
set identity_insert IDS on;
insert into UID (id,trTime) values (ident_current('IDS')+{0},getdate());
select SCOPE_IDENTITY();
set identity_insert IDS off
/****** 第三种解决方案：锁+事务 保证原子性 ******/
declare @i int;
set @i=0;
while @i<200000
begin
begin transaction;
declare @sn bigint,@temp int;
set @temp=(select top 0 id from IDS with (tablockx));
set identity_insert IDS on;
insert into IDS (id,trTime) values (ident_current('IDS')+10,getdate());
insert into SN(uid,OperationTime,ClientIp)values(SCOPE_IDENTITY(),GETDATE(),'127.0.0.1');
set identity_insert IDS off;
set @i=@i+1;
commit transaction;
end