如何给一个表某列加上指定的随机数
一、原始数据
create table #test (name varchar(10),ddate datetime,date1 datetime,date2 datetime)
insert into #test
select '张三','2013-09-01','2013-09-01 09:00:00.000','2013-09-01 17:00:00.000' union all
select '张三','2013-09-02','2013-09-02 09:00:00.000','2013-09-02 17:00:00.000' union all
select '张三','2013-09-03','2013-09-03 09:00:00.000','2013-09-03 17:00:00.000' union all
select '张三','2013-09-04','2013-09-04 09:00:00.000','2013-09-04 17:00:00.000' union all
select '张三','2013-09-05','2013-09-05 09:00:00.000','2013-09-05 17:00:00.000' union all
select '张三','2013-09-06','2013-09-06 09:00:00.000','2013-09-06 17:00:00.000'
select * from #test
create table #test (name varchar(10),ddate datetime,date1 datetime,date2 datetime) insert into #test select '张三','2013-09-01','2013-09-01 09:00:00.000','2013-09-01 17:00:00.000' union allselect '张三','2013-09-02','2013-09-02 09:00:00.000','2013-09-02 17:00:00.000' union allselect '张三','2013-09-03','2013-09-03 09:00:00.000','2013-09-03 17:00:00.000' union allselect '张三','2013-09-04','2013-09-04 09:00:00.000','2013-09-04 17:00:00.000' union allselect '张三','2013-09-05','2013-09-05 09:00:00.000','2013-09-05 17:00:00.000' union allselect '张三','2013-09-06','2013-09-06 09:00:00.000','2013-09-06 17:00:00.000' --sql: select name,ddate, date1 = DATEADD(MINUTE, ABS(CHECKSUM(NEWID()))%10 + 1, date1), date2 = DATEADD(MINUTE, ABS(CHECKSUM(NEWID()))%11 + 5, date2) from #test /* name ddate date1 date2 张三 2013-09-01 00:00:00.000 2013-09-01 09:08:00.000 2013-09-01 17:10:00.000 张三 2013-09-02 00:00:00.000 2013-09-02 09:10:00.000 2013-09-02 17:11:00.000 张三 2013-09-03 00:00:00.000 2013-09-03 09:08:00.000 2013-09-03 17:06:00.000 张三 2013-09-04 00:00:00.000 2013-09-04 09:08:00.000 2013-09-04 17:06:00.000 张三 2013-09-05 00:00:00.000 2013-09-05 09:03:00.000 2013-09-05 17:05:00.000 张三 2013-09-06 00:00:00.000 2013-09-06 09:09:00.000 2013-09-06 17:13:00.000 */
create table #test(name varchar(10),ddate datetime,date1 datetime,date2 datetime) insert into #test select '张三','2013-09-01','2013-09-01 09:00:00.000','2013-09-01 17:00:00.000' union allselect '张三','2013-09-02','2013-09-02 09:00:00.000','2013-09-02 17:00:00.000' union allselect '张三','2013-09-03','2013-09-03 09:00:00.000','2013-09-03 17:00:00.000' union allselect '张三','2013-09-04','2013-09-04 09:00:00.000','2013-09-04 17:00:00.000' union allselect '张三','2013-09-05','2013-09-05 09:00:00.000','2013-09-05 17:00:00.000' union allselect '张三','2013-09-06','2013-09-06 09:00:00.000','2013-09-06 17:00:00.000' -- 更新 declare ap scroll cursor for select name,ddate,date1,date2 from #test declare @n varchar(10),@d datetime,@d1 datetime,@d2 datetime open ap fetch first from ap into @n,@d,@d1,@d2 while(@@fetch_status<>-1) begin update #test set date1=dateadd(mi,cast(rand()*10 as int),date1), date2=dateadd(mi,5+cast(rand()*10 as int),date2) where name=@n and ddate=@d fetch next from ap into @n,@d,@d1,@d2 end close ap deallocate ap -- 结果 select * from #test /* name ddate date1 date2 ---------- ----------------------- ----------------------- ----------------------- 张三 2013-09-01 00:00:00.000 2013-09-01 09:04:00.000 2013-09-01 17:13:00.000 张三 2013-09-02 00:00:00.000 2013-09-02 09:08:00.000 2013-09-02 17:06:00.000 张三 2013-09-03 00:00:00.000 2013-09-03 09:05:00.000 2013-09-03 17:13:00.000 张三 2013-09-04 00:00:00.000 2013-09-04 09:02:00.000 2013-09-04 17:08:00.000 张三 2013-09-05 00:00:00.000 2013-09-05 09:07:00.000 2013-09-05 17:13:00.000 张三 2013-09-06 00:00:00.000 2013-09-06 09:06:00.000 2013-09-06 17:13:00.000 (6 row(s) affected) */