求最小时间/次小时间
表格如下: 
 id   time    
 01      9:01 
 01      9:05 
 01      9:10 
 01      9:55 
 01      10:01 
 ..      ... 
 02      9:11 
 02      9:55 
 02      10:01 
 02      10:11 
 ..      ...   
 求特定ID大于某一时间的最小时间/次小时间 
 比如:   01的9:10 
 结果:   id   min      sec_min 
                   01   9:55   10:01
------解决方案--------------------create table tb(id varchar(10) , time varchar(10))   
 insert into tb values( '01 ',   '09:01 ') 
 insert into tb values( '01 ',   '09:05 ') 
 insert into tb values( '01 ',   '09:10 ') 
 insert into tb values( '01 ',   '09:55 ') 
 insert into tb values( '01 ',   '10:01 ') 
 insert into tb values( '02 ',   '09:11 ') 
 insert into tb values( '02 ',   '09:55 ') 
 insert into tb values( '02 ',   '10:01 ') 
 insert into tb values( '02 ',   '10:11 ') 
 go   
 declare @id as varchar(10) 
 set @id =  '01 ' 
 declare @dt as varchar(10) 
 set @dt =  '09:10 '   
 SELECT * , [order]=(SELECT COUNT(time) FROM (select * from tb where id = @id and time >  @dt) t WHERE time  < a.time) + 1 
 FROM (select * from tb where id = @id and time >  @dt) a 
 ORDER BY [order]   
 drop table tb   
 /* 
 id         time       order        
 ---------- ---------- -----------  
 01         09:55      1 
 01         10:01      2   
 (所影响的行数为 2 行) 
 */