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sqlserver分页有四种方法,先给大家介绍一种常用的
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查看1到3条数据
假如查询每页大小为3,查询第2页的数据就是
declare @iPage int --所取的页的序数 (第几页)
declare @iPageNum int --所取的数据行数(除最后一页外,每页所取的行数应该都是一样的)
declare @iRecordNumber int --取@iPage页时,结尾记录所在行数
declare @iRecordCount int --总记录行数
--变量初始化
set @iPage=1 --可用参数传递
set @iPageNum=10 --默认每页取10行
set @iRecordNumber=@iPage*@iPageNum
select @iRecordCount=count(cirDeId) from (select cirDeId from CircleDetails group by cirDeId) a
--取最后一页时,重算结尾所在行数(@iRecordNumber)、所取记录数(@iPageNum)
if @iRecordNumber@iRecordCount
begin
set @iRecordNumber=@iRecordCount
if (@iRecordNumber%@iPageNum)0
set @iPageNum=@iRecordNumber%@iPageNum
end
select * from (
select top @iPageNum * from(
select top @iRecordNumber cirDeId,
(select count(1) from CirclePost where CircleDetails.cirDeId = CirclePost.cirdeid_cp) circlepostcount
,(select count(1) from CircleAttention where CircleDetails.cirDeId = CircleAttention.cirdeid_ca) circleattentioncount
from CircleDetails group by cirDeId order by 3 desc,2 desc
) order by 3,2
) order by 3 desc,2 desc
写存储过程 ..
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
ALTER PROCEDURE usp_Province_pagination
@PageSize INT, --每页的显示的行数
@AbsolutePage INT, -- 当前页的页数
@PageCount INT OUTPUT --总页数
AS
DECLARE @BeginRecord INT --记录每此从哪一行开始读取
DECLARE @RecordCount INT --表中数据的总条数
DECLARE @sql NVARCHAR(1000)
SET @RecordCount = (SELECT count(*) FROM Province)
--表中没有数据的情况
IF @RecordCount = 0
BEGIN
SET @PageCount = 0
RETURN(0)
END
-- 表中的总条数大于定义的每页的行数的情况
IF @RecordCount @PageSize
BEGIN
-- 计算总能分多少页
SET @PageCount = (@RecordCount + @PageSize - 1)/@PageSize
--当前应该从哪一行开始读取
SET @BeginRecord = ((@AbsolutePage-1) * @PageSize)
SET @sql = N'SELECT TOP ' + cast(@PageSize AS NVARCHAR(100)) +' ProvinceID, provinceCode, ProvinceName
FROM Province
WHERE ProvinceID NOT IN
(SELECT TOP '+ CAST(@BeginRecord AS NVARCHAR(100)) + ' ProvinceID
FROM Province)'
EXECUTE sp_executesql @sql
END
ELSE -- -- 表中的总条数大于定义的每页的行数情况
BEGIN
SET @PageCount = 1
SET @SQL = 'SELECT ProvinceID, provinceCode, ProvinceName FROM Province '
EXECUTE sp_executesql @sql
END
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
存储过程:create Procedure pname
( @pageIndex int,@pageSize)
as
select * from tableName order by id
offset @pageIndex * pageSize fetch next pageSize rows only
分页:
sqlserver 在2008之前 使用 top 和 not int top 的方式来做分页
2008以后使用 row_number() 函数作为分页关键函数
2012使用 offset 1 fetch next 10 rows only
你问了2个问题,你可以优先把视图,存储过程,触发器等弄明白,分页是查询,在存储过程里可以写复杂的sql文,只是在运行时是预编译和参数化查询防止sql注入
分两步实现
一、分页的存储过程如下
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
CREATE PROCEDURE [dbo].[Pagination]
@tblName varchar(255), -- 表名
@strGetFields varchar(1000) , -- 需要返回的列
@fldName varchar(255), -- 排序的字段名
@PageSize int, -- 页尺寸
@PageIndex int , -- 页码
@doCount bit=0, -- 返回记录总数, 非 0 值则返回
@OrderType bit, -- 设置排序类型, 非 0 值则降序
@strWhere varchar(1500) -- 查询条件 (注意: 不要加 where)
AS
declare @strSQL varchar(5000) -- 主语句
declare @strTmp varchar(110) -- 临时变量
declare @strOrder varchar(400) -- 排序类型
if @doCount != 0
begin
if @strWhere !=''
set @strSQL = 'select count(*) as Total from [' + @tblName + '] where ' + @strWhere
else
set @strSQL = 'select count(*) as Total from [' + @tblName + ']'
end
--以上代码的意思是如果@doCount传递过来的不是0,就执行总数统计。以下的所有代码都是@doCount为0的情况
else
begin
if @OrderType != 0
begin
set @strTmp = '(select min'
set @strOrder = ' order by [' + @fldName + '] desc'
end
--如果@OrderType不是0,就执行降序,这句很重要!
else
begin
set @strTmp = '(select max'
set @strOrder = ' order by [' + @fldName + '] asc'
end
if @PageIndex = 1
begin
if @strWhere != ''
set @strSQL = 'select top ' + str(@PageSize) + ' ' + @strGetFields + ' from [' + @tblName + '] where '
+ @strWhere + ' ' + @strOrder
else
set @strSQL = 'select top ' + str(@PageSize) + ' ' + @strGetFields
+ ' from [' + @tblName + '] ' + @strOrder
end
--如果是第一页就执行以上代码,这样会加快执行速度
else
begin
--以下代码赋予了@strSQL以真正执行的SQL代码
set @strSQL = 'select top ' + str(@PageSize) + ' ' + @strGetFields + ' from ['
+ @tblName + '] where [' + @fldName + ']' + @strTmp + '(['+ @fldName + ']) from (select top '
+ str( ( @PageIndex - 1 ) * @PageSize ) + ' ['+ @fldName + '] from [' + @tblName + ']'
+ @strOrder + ') as tblTmp)' + @strOrder
if @strWhere != ''
set @strSQL = 'select top ' + str(@PageSize) + ' ' + @strGetFields + ' from ['
+ @tblName + '] where [' + @fldName + ']' + @strTmp + '(['
+ @fldName + ']) from (select top ' + str( ( @PageIndex - 1 ) * @PageSize ) + ' ['
+ @fldName + '] from [' + @tblName + '] where ' + @strWhere + ' '
+ @strOrder + ') as tblTmp) and ' + @strWhere + ' ' + @strOrder
end
end
exec(@strSQL)
二、页面调用部分代码
Function navindex(ByVal PageIndextemp As Integer, ByVal PageSizetemp As Integer, ByVal countint As Integer, ByVal pagename As String) As String
Dim i As Integer
If countint Mod PageSizetemp = 0 Then
i = countint \ PageSizetemp
Else
i = countint \ PageSizetemp + 1
End If
Dim maxi, mini As Integer
Dim navleft, navright, navstrtemp As String
If i 10 Then
maxi = i
mini = 1
Else
maxi = pageindex + 3
mini = pageindex - 3
If mini 1 Then
navleft = "a href=""" pagename "?page=" (mini - 1) """ class=""link_nav_btn""/a "
Else
mini = 1
maxi = 10
End If
If maxi i Then
navright = " a href=""" pagename "?page=" (maxi + 1) """ class=""link_nav_btn""/a"
Else
If i - 10 0 Then
mini = i - 10
Else
mini = 1
End If
maxi = i
End If
End If
For n As Integer = mini To maxi
If n = pageindex Then
navstrtemp = navstrtemp " a href=""" pagename "?page=" n """ class=""link_nav_btn_select""b" n "/b/a"
Else
navstrtemp = navstrtemp " a href=""" pagename "?page=" n """ class=""link_nav_btn""" n "/a"
End If
Next
navstrtemp = navleft navstrtemp navright
Return navstrtemp
End Function
Sub databinds(ByVal tblnametemp As String, ByVal strGetFieldstemp As String, ByVal fldNametemp As String, ByVal PageSizetemp As Integer, ByVal PageIndextemp As Integer, ByVal OrderTypetemp As Short, ByVal strWheretemp As String)
'tblnametemp表名,strGetFieldstemp需要返回的列,fldNametemp排序的字段名,PageSizetemp页尺寸,PageIndextemp页码,OrderTypetemp设置排序类型,strWheretemp查询条件
'总数
cmdTM = New SqlCommand("select count(*) from " tblnametemp " where " strWheretemp, conPubs)
conPubs.Open()
countint = CInt(cmdTM.ExecuteScalar())
conPubs.Close()
'导航
navstr = navindex(PageIndextemp, PageSizetemp, countint, "newshyxh.aspx")
'分页
cmdTM = New SqlCommand("Pagination", conPubs)
cmdTM.CommandType = CommandType.StoredProcedure
'add input
cmdTM.Parameters.Add("@tblName", SqlDbType.VarChar, 255).Value = tblnametemp
cmdTM.Parameters.Add("@strGetFields", SqlDbType.VarChar, 1000).Value = strGetFieldstemp
cmdTM.Parameters.Add("@fldName", SqlDbType.VarChar, 255).Value = fldNametemp
cmdTM.Parameters.Add("@PageIndex", SqlDbType.Int).Value = PageIndextemp
cmdTM.Parameters.Add("@PageSize", SqlDbType.Int).Value = PageSizetemp
cmdTM.Parameters.Add("@OrderType", SqlDbType.Bit).Value = OrderTypetemp
cmdTM.Parameters.Add("@strWhere", SqlDbType.VarChar, 1500).Value = strWheretemp
conPubs.Open()
newsright.DataSource = cmdTM.ExecuteReader()
newsright.DataBind()
conPubs.Close()
End Sub