求次大时间的记录
 表格如下: 
 id   num   time 
 01      2         9:10 
 01      1         9:11 
 01      4         9:27 
 01   1.2      10:10 
 03      10      10:15 
 03      17      10:25 
 03      13      10:35 
 03      12      10:45 
 03         1      10:55   
 求: 
 id   num    
 01      4 
 03      12 
------解决方案--------------------Create Table TEST 
 (id Char(2), 
  num Int, 
  [time] Varchar(10)) 
 Insert TEST Select  '01 ',  2,    '9:10 ' 
 Union All Select  '01 ',  1,    '9:11 ' 
 Union All Select  '01 ',  4,    '9:27 ' 
 Union All Select  '01 ', 12,   '10:10 ' 
 Union All Select  '03 ',  10,   '10:15 ' 
 Union All Select  '03 ',  17,   '10:25 ' 
 Union All Select  '03 ',  13,   '10:35 ' 
 Union All Select  '03 ',  12,   '10:45 ' 
 Union All Select  '03 ',   1,    '10:55 ' 
 GO 
 Select A.id, A.num From TEST A Where (Select Count(id) From TEST Where id = A.id And Cast( '1900-01-01  ' +  [time] As DateTime) >  Cast( '1900-01-01  ' +  A.[time] As DateTime)) = 1 
 GO 
 Drop Table TEST 
 --Result 
 /* 
 id	num 
 01	4 
 03	12 
 */