identity_insert---实验性插入大批量数据和分页存储过程

OK,我们首先创建一数据库：data_Test,并在此数据库中创建一表：tb_TestTable

1create database data_Test  --创建数据库data_Test 
 2GO 
 3use data_Test 
 4GO 
 5create table tb_TestTable   --创建表 
 6( 
 7    id int identity(1,1) primary key, 
 8    userName nvarchar(20) not null, 
 9    userPWD nvarchar(20) not null, 
10    userEmail nvarchar(40) null 
11) 
12GO

然后我们在数据表中插入2000000条数据:

1--插入数据 
 2set identity_insert tb_TestTable on 
 3declare @count int 
 4set @count=1 
 5while @count<=2000000 
 6begin  
 7    insert into tb_TestTable(id,userName,userPWD,userEmail) values(@count,'admin','admin888','lli0077@yahoo.com.cn') 
 8    set @count=@count+1 
 9end 
10set identity_insert tb_TestTable off

我首先写了五个常用存储过程：

1，利用select top 和select not in进行分页，具体代码如下：

 

1create procedure proc_paged_with_notin  --利用select top and select not in 
 2( 
 3    @pageIndex int,  --页索引 
 4    @pageSize int    --每页记录数 
 5) 
 6as 
 7begin 
 8    set nocount on; 
 9    declare @timediff datetime --耗时 
10    declare @sql nvarchar(500) 
11    select @timediff=Getdate() 
12    set @sql='select top '+str(@pageSize)+' * from tb_TestTable where(ID not in(select top '+str(@pageSize*@pageIndex)+' id from tb_TestTable order by ID ASC)) order by ID' 
13    execute(@sql)  --因select top后不支技直接接参数，所以写成了字符串@sql 
14    select datediff(ms,@timediff,GetDate()) as 耗时 
15    set nocount off; 
16end

 

2,利用select top 和 select max(列键)

1create procedure proc_paged_with_selectMax  --利用select top and select max(列) 
 2( 
 3    @pageIndex int,  --页索引 
 4    @pageSize int    --页记录数 
 5) 
 6as 
 7begin 
 8set nocount on; 
 9    declare @timediff datetime 
10    declare @sql nvarchar(500) 
11    select @timediff=Getdate() 
12    set @sql='select top '+str(@pageSize)+' * From tb_TestTable where(ID>(select max(id) From (select top '+str(@pageSize*@pageIndex)+' id From tb_TestTable order by ID) as TempTable)) order by ID' 
13    execute(@sql) 
14    select datediff(ms,@timediff,GetDate()) as 耗时 
15set nocount off; 
16end
复制代码

3,利用select top和中间变量--此方法因网上有人说效果最佳，所以贴出来一同测试

 1create procedure proc_paged_with_Midvar  --利用ID>最大ID值和中间变量 
 2( 
 3    @pageIndex int, 
 4    @pageSize int 
 5) 
 6as 
 7    declare @count int 
 8    declare @ID int 
 9    declare @timediff datetime 
10    declare @sql nvarchar(500) 
11begin 
12set nocount on; 
13    select @count=0,@ID=0,@timediff=getdate() 
14    select @count=@count+1,@ID=case when @count<=@pageSize*@pageIndex then ID else @ID end from tb_testTable order by id 
15    set @sql='select top '+str(@pageSize)+' * from tb_testTable where ID>'+str(@ID) 
16    execute(@sql) 
17    select datediff(ms,@timediff,getdate()) as 耗时 
18set nocount off; 
19end
20

4,利用Row_number() 此方法为SQL server 2005中新的方法,利用Row_number()给数据行加上索引

 1create procedure proc_paged_with_Rownumber  --利用SQL 2005中的Row_number() 
 2( 
 3    @pageIndex int, 
 4    @pageSize int 
 5) 
 6as 
 7    declare @timediff datetime 
 8begin 
 9set nocount on; 
10    select @timediff=getdate() 
11    select * from (select *,Row_number() over(order by ID asc) as IDRank from tb_testTable) as IDWithRowNumber where IDRank>@pageSize*@pageIndex and IDRank<@pageSize*(@pageIndex+1) 
12    select datediff(ms,@timediff,getdate()) as 耗时 
13set nocount off; 
14end
15

5，利用临时表及Row_number

 1create procedure proc_CTE  --利用临时表及Row_number 
 2( 
 3    @pageIndex int,  --页索引 
 4    @pageSize int    --页记录数 
 5) 
 6as 
 7    set nocount on; 
 8    declare @ctestr nvarchar(400) 
 9    declare @strSql nvarchar(400) 
10    declare @datediff datetime 
11begin 
12    select @datediff=GetDate() 
13    set @ctestr='with Table_CTE as 
14                (select ceiling((Row_number() over(order by ID ASC))/'+str(@pageSize)+') as page_num,* from tb_TestTable)'; 
15    set @strSql=@ctestr+' select * From Table_CTE where page_num='+str(@pageIndex) 
16end 
17    begin 
18        execute sp_executesql @strSql 
19        select datediff(ms,@datediff,GetDate()) 
20    set nocount off; 
21    end
22
复制代码

OK,至此，存储过程创建完毕，我们分别在每页10条数据的情况下在第2页，第1000页，第10000页，第100000页，第199999页进行测试，耗时单位：ms  每页测试5次取其平均值

存过	第2页耗时	第1000页耗时	第10000页耗时	第100000页耗时	第199999页耗时	效率排行
1用not in	0ms	16ms	47ms	475ms	953ms	3
2用select max	5ms	16ms	35ms	325ms	623ms	1
3中间变量	966ms	970ms	960ms	945ms	933ms	5
4row_number	0ms	0ms	34ms	365ms	710ms	2
4临时表	780ms	796ms	798ms	780ms	805ms	4

测试结果显示：select max >row_number>not in>临时表>中间变量

 于是我对效率最高的select max方法用2分法进行了扩展，代码取自互联网，我修改了ASC排序时取不到值的BUG，测

2分法

156ms

156ms

180ms

470ms

156ms

1*

 从测试结果来看，使用2分法确实可以提高效率并使效率更为稳定，我又增加了第159999页的测试，用时仅296ms，效果相当的不错！

 下面是2分法使用select max的代码，已相当完善。

 

 1--/*-----存储过程 分页处理 孙伟 2005-03-28创建 -------*/ 
  2--/*-----存储过程 分页处理 浪尘 2008-9-1修改----------*/ 
  3--/*----- 对数据进行了2分处理使查询前半部分数据与查询后半部分数据性能相同 -------*/ 
  4
  5alter PROCEDURE proc_paged_2part_selectMax 
  6( 
  7@tblName     nvarchar(200),        ----要显示的表或多个表的连接 
  8@fldName     nvarchar(500) = '*',    ----要显示的字段列表 
  9@pageSize    int = 10,        ----每页显示的记录个数 
 10@page        int = 1,        ----要显示那一页的记录 
 11@fldSort    nvarchar(200) = null,    ----排序字段列表或条件 
 12@Sort        bit = 0,        ----排序方法，0为升序，1为降序(如果是多字段排列Sort指代最后一个排序字段的排列顺序(最后一个排序字段不加排序标记)--程序传参如：' SortA Asc,SortB Desc,SortC ') 
 13@strCondition    nvarchar(1000) = null,    ----查询条件,不需where 
 14@ID        nvarchar(150),        ----主表的主键 
 15@Dist                 bit = 0,           ----是否添加查询字段的 DISTINCT 默认0不添加/1添加 
 16@pageCount    int = 1 output,            ----查询结果分页后的总页数 
 17@Counts    int = 1 output                ----查询到的记录数 
 18) 
 19AS 
 20SET NOCOUNT ON 
 21Declare @sqlTmp nvarchar(1000)        ----存放动态生成的SQL语句 
 22Declare @strTmp nvarchar(1000)        ----存放取得查询结果总数的查询语句 
 23Declare @strID     nvarchar(1000)        ----存放取得查询开头或结尾ID的查询语句 
 24
 25Declare @strSortType nvarchar(10)    ----数据排序规则A 
 26Declare @strFSortType nvarchar(10)    ----数据排序规则B 
 27
 28Declare @SqlSelect nvarchar(50)         ----对含有DISTINCT的查询进行SQL构造 
 29Declare @SqlCounts nvarchar(50)          ----对含有DISTINCT的总数查询进行SQL构造 
 30
 31declare @timediff datetime  --耗时测试时间差 
 32select @timediff=getdate() 
 33
 34if @Dist  = 0 
 35begin 
 36    set @SqlSelect = 'select ' 
 37    set @SqlCounts = 'Count(*)' 
 38end 
 39else 
 40begin 
 41    set @SqlSelect = 'select distinct ' 
 42    set @SqlCounts = 'Count(DISTINCT '+@ID+')' 
 43end 
 44
 45
 46if @Sort=0 
 47begin 
 48    set @strFSortType=' ASC ' 
 49    set @strSortType=' DESC ' 
 50end 
 51else 
 52begin 
 53    set @strFSortType=' DESC ' 
 54    set @strSortType=' ASC ' 
 55end 
 56
 57
 58
 59--------生成查询语句-------- 
 60--此处@strTmp为取得查询结果数量的语句 
 61if @strCondition is null or @strCondition=''     --没有设置显示条件 
 62begin 
 63    set @sqlTmp =  @fldName + ' From ' + @tblName 
 64    set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName 
 65    set @strID = ' From ' + @tblName 
 66end 
 67else 
 68begin 
 69    set @sqlTmp = + @fldName + 'From ' + @tblName + ' where (1>0) ' + @strCondition 
 70    set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName + ' where (1>0) ' + @strCondition 
 71    set @strID = ' From ' + @tblName + ' where (1>0) ' + @strCondition 
 72end 
 73
 74----取得查询结果总数量----- 
 75exec sp_executesql @strTmp,N'@Counts int out ',@Counts out 
 76declare @tmpCounts int 
 77if @Counts = 0 
 78    set @tmpCounts = 1 
 79else 
 80    set @tmpCounts = @Counts 
 81
 82    --取得分页总数 
 83    set @pageCount=(@tmpCounts+@pageSize-1)/@pageSize 
 84
 85    /**//**当前页大于总页数 取最后一页**/ 
 86    if @page>@pageCount 
 87        set @page=@pageCount 
 88
 89    --/*-----数据分页2分处理-------*/ 
 90    declare @pageIndex int --总数/页大小 
 91    declare @lastcount int --总数%页大小  
 92
 93    set @pageIndex = @tmpCounts/@pageSize 
 94    set @lastcount = @tmpCounts%@pageSize 
 95    if @lastcount > 0 
 96        set @pageIndex = @pageIndex + 1 
 97    else 
 98        set @lastcount = @pagesize 
 99
100    --//***显示分页 
101    if @strCondition is null or @strCondition=''     --没有设置显示条件 
102    begin 
103        if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理 
104            begin  
105                if @page=1 
106                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName                         
107                        +' order by '+ @fldSort +' '+ @strFSortType 
108                else 
109                begin 
110                    if @Sort=1 
111                    begin                     
112                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
113                        +' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
114                        +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
115                        +' order by '+ @fldSort +' '+ @strFSortType 
116                    end 
117                    else 
118                    begin 
119                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
120                        +' where '+@ID+' >(select max('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
121                        +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
122                        +' order by '+ @fldSort +' '+ @strFSortType  
123                    end 
124                end     
125            end 
126        else 
127            begin 
128            set @page = @pageIndex-@page+1 --后半部分数据处理 
129                if @page <= 1 --最后一页数据显示                 
130                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
131                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType  
132                else 
133                    if @Sort=1 
134                    begin 
135                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
136                        +' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
137                        +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
138                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType 
139                    end 
140                    else 
141                    begin 
142                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
143                        +' where '+@ID+' <(select min('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
144                        +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
145                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType  
146                    end 
147            end 
148    end 
149
150    else --有查询条件 
151    begin 
152        if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理 
153        begin 
154                if @page=1 
155                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName                         
156                        +' where 1=1 ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType 
157                else if(@Sort=1) 
158                begin                     
159                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
160                        +' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
161                        +' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
162                        +' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType 
163                end 
164                else 
165                begin 
166                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
167                        +' where '+@ID+' >(select max('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
168                        +' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
169                        +' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType  
170                end            
171        end 
172        else 
173        begin  
174            set @page = @pageIndex-@page+1 --后半部分数据处理 
175            if @page <= 1 --最后一页数据显示 
176                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
177                        +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType                      
178            else if(@Sort=1) 
179                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
180                        +' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
181                        +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
182                        +' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType     
183            else 
184                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
185                        +' where '+@ID+' <(select min('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
186                        +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
187                        +' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType             
188        end     
189    end 
190
191------返回查询结果----- 
192exec sp_executesql @strTmp 
193select datediff(ms,@timediff,getdate()) as 耗时 
194--print @strTmp 
195SET NOCOUNT OFF 
196GO
197