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sql server存儲(chǔ)過程分頁總結(jié)

數(shù)據(jù)庫 SQL Server
對于非常大的數(shù)據(jù)模型而言,分頁檢索時(shí),如果按照傳統(tǒng)的每次都加載整個(gè)數(shù)據(jù)源的方法是非常浪費(fèi)資源的。現(xiàn)在流行的分頁方法一般是檢索頁面大小的塊區(qū)的數(shù)據(jù),而非檢索所有的數(shù)據(jù),然后單步執(zhí)行當(dāng)前行。

導(dǎo)讀:sql server存儲(chǔ)過程分頁是一種很實(shí)用的數(shù)據(jù)庫操作技巧,下文為大家介紹幾種分頁方案。

分頁方案一:(利用Not In和SELECT TOP分頁)
語句形式:
SELECT ***0 *
FROM TestTable
WHERE (ID NOT IN
(SELECT TOP 20 id
FROM TestTable
ORDER BY id))
ORDER BY ID

 

SELECT TOP 頁大小 *
FROM TestTable
WHERE (ID NOT IN
(SELECT TOP 頁大小*頁數(shù) id
FROM 表
ORDER BY id))
ORDER BY ID
分頁方案二:
語句形式:
Create PROCEDURE ListPage(
@tblName nvarchar(200), ----要顯示的表或多個(gè)表的連接
@fldName nvarchar(200) = '*', ----要顯示的字段列表
@pageSize int = 10, ----每頁顯示的記錄個(gè)數(shù)
@page int = 1, ----要顯示那一頁的記錄
@pageCount int = 1 output, ----查詢結(jié)果分頁后的總頁數(shù)
@Counts int = 1 output, ----查詢到的記錄數(shù)
@fldSort nvarchar(100) = null, ----排序字段列表或條件
@Sort bit = 0, ----排序方法,0為升序,1為降序
@strCondition nvarchar(200) = null, ----查詢條件,不需where
@ID nvarchar(50) ----主表的主鍵
)
AS
SET NOCOUNT ON
Declare @sqlTmp nvarchar(1000) ----存放動(dòng)態(tài)生成的SQL語句
Declare @strTmp nvarchar(1000) ----存放取得查詢結(jié)果總數(shù)的查詢語句
Declare @strID nvarchar(1000) ----存放取得查詢開頭或結(jié)尾ID的查詢語句
Declare @sqlSort nvarchar(200) ----存放臨時(shí)生成的排序條件
Declare @intCounts int ----要移動(dòng)的記錄數(shù)
Declare @BeginID int ----開始的ID
Declare @EndID int ----結(jié)束的ID

 

--------首先生成排序方法---------
if @Sort=0 --升序
begin
if not(@fldSort is null)
set @sqlSort = ' Order by ' + @fldSort
else
set @sqlSort = ' Order by ' + @ID
end
else --降序
begin
if not(@fldSort is null)
set @sqlSort = ' Order by ' + @fldSort + ' DESC'
else
set @sqlSort = ' Order by ' + @ID + ' DESC '
end

--------生成查詢語句--------
--此處@strTmp為取得查詢結(jié)果數(shù)量的語句
if @strCondition is null --沒有設(shè)置顯示條件
begin
set @sqlTmp = @fldName + ' From ' + @tblName
set @strTmp = 'select @Counts=Count(' + @ID + ') FROM '+@tblName
set @strID = ' From ' + @tblName
end
else
begin
set @sqlTmp = + @fldName + 'From ' + @tblName + ' where ' + @strCondition
set @strTmp = 'select @Counts=Count(' + @ID + ') FROM '+@tblName + ' where ' + @strCondition
set @strID = ' From ' + @tblName + ' where ' + @strCondition
end

----取得查詢結(jié)果總數(shù)量-----
exec sp_executesql @strTmp,N'@Counts int out ',@Counts out

--取得分頁總數(shù)
if @Counts <= @pageSize
set @pageCount = 1
else
set @pageCount = (@Counts / @pageSize) + 1

--計(jì)算要移動(dòng)的記錄數(shù)
if @page = 1
set @intCounts = @pageSize
else
begin
set @intCounts = (@page-1) * @pageSize + 1
end

-----取得分頁后此頁的***條記錄的ID
set @strID = 'select @BeginID=' + @ID + ' ' + @strID

 

set @intCounts = @intCounts - @pageSize + 1
set rowcount @intCounts
exec sp_executesql @strID,N'@BeginID int out ',@BeginID out

-----取得分頁后此頁的***一條記錄的ID
set @intCounts = @intCounts + @pageSize - 1
print @intCounts
set rowcount @intCounts
exec sp_executesql @strID,N'@BeginID int out ',@EndID out

------恢復(fù)系統(tǒng)設(shè)置-----
set rowcount 0
SET NOCOUNT OFF

------返回查詢結(jié)果-----
if @strCondition is null
set @strTmp = 'select ' + @sqlTmp + ' where ' + @ID + ' between ' + str(@BeginID) + ' and ' + str(@EndID)
else
set @strTmp = 'select ' + @sqlTmp + ' where ' + @ID +' (between ' + str(@BeginID) + ' and ' + str(@EndID) + ') and ' + @strCondition

if not(@sqlSort is null)
set @strTmp = @strTmp + @sqlSort
exec sp_executesql @strTmp

GO
分頁方案三:
語句形式:
create PROCEDURE sy_more_cs
(
@mode int=0,
@pagesize int=10,
@pageindex int=1
)
AS
SET NOCOUNT ON
if @mode=0
begin
select count(*) as 記錄數(shù) from dbo.house_info_cs;
end
else
begin
declare @indextable table(id int identity(1,1),nid int)
declare @PageLowerBound int
declare @PageUpperBound int

set @PageLowerBound=(@pageindex-1)*@pagesize
set @PageUpperBound=@PageLowerBound+@pagesize

insert into @indextable(nid) select [id] from dbo.house_info_cs order by dt desc;

select ls.* from dbo.house_info_cs ls,@indextable t where ls.id=t.nid
and t.id>@PageLowerBound and t.id<=@PageUpperBound order by t.id
end

sql server存儲(chǔ)過程分頁總結(jié)就為大家介紹這些,很高興與大家分享這些知識,希望對大家有所幫助。

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