SQL SERVER2012新分页方式[转]

SQL SERVER2012在ORDER BY 子句中加入了新元素offset,允许用户在排序完成的结果集中自定义输出行范围，大大简化了分页SQL的书写方式和效率。以下是与以前的两种分页方式的简单对比

 1 use master
 2 go
 3 set nocount on
 4 go
 5 set showplan_text on
 6 go
 7 --2012的OFFSET分页方式
 8 select number 
 9 from spt_values
10 where type='p'
11 order by number offset 10 rows fetch next 5 rows only;
12 go
13 --2005的ROW_NUMBER分页方式
14 select number from (
15 select number,row_number() over(order by number) as num from spt_values where type='p'
16 ) t where num between 11 and 15
17 order by number asc
18 go
19 --2000的TOP分页方式
20 select number from (
21 select top 5 number from (
22 select top 15 number from spt_values where type='p' order by number asc
23 ) t
24 order by number desc
25 ) t 
26 order by number asc
27 go
28 set showplan_text off
29 go
30 /*
31 StmtText
32 ----------------------------------------------------------------------------------------------------------
33 select number 
34 from spt_values
35 where type='p'
36 order by number offset 10 rows fetch next 5 rows only;
37 
38 StmtText
39 --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
40   |--Top(OFFSET EXPRESSION:((10)),TOP EXPRESSION:((5)))
41        |--Index Scan(OBJECT:([mssqlsystemresource].[sys].[spt_values].[ix2_spt_values_nu_nc]),  WHERE:(CONVERT(nchar(3),[mssqlsystemresource].[sys].[spt_values].[type],0)=N'p') ORDERED FORWARD)
42 
43 StmtText
44 ---------------------------------------------------------------------------------------------------------------------------------------------------------------------
45 select number from (
46 select number,row_number() over(order by number) as num from spt_values where type='p'
47 ) t where num between 11 and 15
48 order by number asc
49 
50 StmtText
51 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
52   |--Sort(ORDER BY:([mssqlsystemresource].[sys].[spt_values].[number] ASC))
53        |--Filter(WHERE:([Expr1005]>=(11) AND [Expr1005]<=(15)))
54             |--Top(TOP EXPRESSION:(CASE WHEN (15) IS NULL OR (15)<(0) THEN (0) ELSE (15) END))
55                  |--Sequence Project(DEFINE:([Expr1005]=row_number))
56                       |--Segment
57                            |--Index Scan(OBJECT:([mssqlsystemresource].[sys].[spt_values].[ix2_spt_values_nu_nc]),  WHERE:(CONVERT(nchar(3),[mssqlsystemresource].[sys].[spt_values].[type],0)=N'p') ORDERED FORWARD)
58 
59 StmtText
60 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
61 select number from (
62 select top 5 number from (
63 select top 15 number from spt_values where type='p' order by number asc
64 ) t
65 order by number desc
66 ) t 
67 order by number asc
68 
69 StmtText
70 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
71   |--Sort(ORDER BY:([mssqlsystemresource].[sys].[spt_values].[number] ASC))
72        |--Sort(TOP 5, ORDER BY:([mssqlsystemresource].[sys].[spt_values].[number] DESC))
73             |--Top(TOP EXPRESSION:((15)))
74                  |--Index Scan(OBJECT:([mssqlsystemresource].[sys].[spt_values].[ix2_spt_values_nu_nc]),  WHERE:(CONVERT(nchar(3),[mssqlsystemresource].[sys].[spt_values].[type],0)=N'p') ORDERED FORWARD)
75 
76 */

use master
go
set nocount on
go
set showplan_text on
go
--2012的OFFSET分页方式
select number 
from spt_values
where type='p'
order by number offset 10 rows fetch next 5 rows only;
go
--2005的ROW_NUMBER分页方式
select number from (
select number,row_number() over(order by number) as num from spt_values where type='p'
) t where num between 11 and 15
order by number asc
go
--2000的TOP分页方式
select number from (
select top 5 number from (
select top 15 number from spt_values where type='p' order by number asc
) t
order by number desc
) t 
order by number asc
go
set showplan_text off
go
/*
StmtText
----------------------------------------------------------------------------------------------------------
select number 
from spt_values
where type='p'
order by number offset 10 rows fetch next 5 rows only;

StmtText
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  |--Top(OFFSET EXPRESSION:((10)),TOP EXPRESSION:((5)))
       |--Index Scan(OBJECT:([mssqlsystemresource].[sys].[spt_values].[ix2_spt_values_nu_nc]),  WHERE:(CONVERT(nchar(3),[mssqlsystemresource].[sys].[spt_values].[type],0)=N'p') ORDERED FORWARD)

StmtText
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
select number from (
select number,row_number() over(order by number) as num from spt_values where type='p'
) t where num between 11 and 15
order by number asc

StmtText
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  |--Sort(ORDER BY:([mssqlsystemresource].[sys].[spt_values].[number] ASC))
       |--Filter(WHERE:([Expr1005]>=(11) AND [Expr1005]<=(15)))
            |--Top(TOP EXPRESSION:(CASE WHEN (15) IS NULL OR (15)<(0) THEN (0) ELSE (15) END))
                 |--Sequence Project(DEFINE:([Expr1005]=row_number))
                      |--Segment
                           |--Index Scan(OBJECT:([mssqlsystemresource].[sys].[spt_values].[ix2_spt_values_nu_nc]),  WHERE:(CONVERT(nchar(3),[mssqlsystemresource].[sys].[spt_values].[type],0)=N'p') ORDERED FORWARD)

StmtText
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
select number from (
select top 5 number from (
select top 15 number from spt_values where type='p' order by number asc
) t
order by number desc
) t 
order by number asc

StmtText
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  |--Sort(ORDER BY:([mssqlsystemresource].[sys].[spt_values].[number] ASC))
       |--Sort(TOP 5, ORDER BY:([mssqlsystemresource].[sys].[spt_values].[number] DESC))
            |--Top(TOP EXPRESSION:((15)))
                 |--Index Scan(OBJECT:([mssqlsystemresource].[sys].[spt_values].[ix2_spt_values_nu_nc]),  WHERE:(CONVERT(nchar(3),[mssqlsystemresource].[sys].[spt_values].[type],0)=N'p') ORDERED FORWARD)

*/