Urggggg! 我一直在挣扎与此很长一段时间! 我可以与MySQL那么容易,但不能与SQL Server做:(
下面是应一起加入了简化表。
通过使用内部联接语法所有的人结合,我必须写一个查询在未来的(顺便说一句,PHP)使用分页。 比方说,我需要它拍摄照片之间每页2012-10-01和二〇一二年十月三十○日....和20人的所有ID,名称和日期信息。
什么是在这里实现这一目标最简单的查询? (我试过NOT IN ..但它是如此的马车因为我不习惯“不在”的东西...)
您可以忽略的性能速度。
谢谢!
Answer 1:
这是我会怎么做在SQL Server 2005+:
SELECT ID, Name, Photo, CreatedDate, rowNum, (rowNum / 20) + 1 as pageNum
FROM (
SELECT a.ID, a.Name, b.Photo, c.Created_Date
, Row_Number() OVER (ORDER BY c.Created_Date ASC) as rowNum
FROM a
JOIN b ON a.ID = b.ID
JOIN c ON c.photo = b.photo
WHERE c.Created_Date BETWEEN '2012-01-1' AND '2012-10-30'
) x
WHERE (rowNum / 20) + 1 = 1
请注意,我用一个小整数除法权谋计算页码。
由于2005年之前的黯然没有ROW_NUMBER(),我会使用一个中间表与标识列:
SELECT a.ID, a.Name, b.Photo, c.Created_Date
, identity(int,1,1) as rowNum
INTO t
FROM a
JOIN b ON a.ID = b.ID
JOIN c ON c.photo = b.photo
WHERE c.Created_Date BETWEEN '2012-01-1' AND '2012-10-30'
ORDER BY c.Created_Date ASC
GO
ALTER TABLE t ADD pageNum AS rowNum / 20
GO
SELECT ID, Name, Photo, Created_Date, rowNum
FROM t
WHERE pageNum = 1
Answer 2:
这里是我做到了一个很久以前..
SELECT * FROM (
SELECT TOP y * FROM (
SELECT TOP x * FROM sometable
ORDER BY somefield ASC
)
ORDER BY somefield DESC)
ORDER BY somefield
最里面的查询,SELECT TOP X,抓住行的第一个x号,第二个查询SELECT TOP Y,得到x行的最后一个Y,以及最外面的查询,SELECT *结果放置在正确的顺序。
这里是解释博客文章它是如何工作下面是一个博客文章中,我在2006年写了回信谈论它http://code.rawlinson.us/2006/12/t-sql-query-paging.html
该TL;博士; 的帖子是这一段:
举例来说,假设我们要在第一页,那么前20的结果。 这是很容易的,只要使用SELECT TOP 20 ... 但对于第二次或以后的页面? 你如何获得21-40的项目? 这是很容易,你可能会怀疑。 什么你实际上是试图得到的是顶的X结果下Y。 看你想向后下令前X结果的顶部Ÿ另一种方式。
这取决于你如何计算并提供x和y的值来查询。
Answer 3:
微软增加了在SQL Server 2012及以上使用本地分页功能, “OFFSET”和“Fetch” 。 您可以使用此功能如下:
-- Skip the first 500 rows and return the next 100
SELECT *
FROM TableName
ORDER BY [ID]
OFFSET 500 ROWS
FETCH NEXT 100 ROWS ONLY;
对于OFFSET __
和FETCH NEXT __
子句,可以指定的恒定值(如上),或可以指定变量,表达式,或恒定标量子查询。
Answer 4:
与SQL Server 2008 +试试这个的AdventureWorks数据库
DECLARE @PageIndex INT, @RowsPerPage INT
DECLARE @StartRow INT, @EndRow INT;
SET @PageIndex = 1;
SET @RowsPerPage = 500;
SET @StartRow = ((@PageIndex - 1) * @RowsPerPage) + 1;
SET @EndRow = @StartRow + @RowsPerPage - 1;
--append#1
WITH PAGE_ROWS
AS
(
SELECT ROW_NUMBER() OVER(ORDER BY OrderDate DESC, SalesOrderNumber ASC) AS ROW_NO
, COUNT(*) OVER() AS TOTAL_ROWS
, *
FROM(
--working query
SELECT S.SalesOrderID
, S.SalesOrderNumber
, S.OrderDate
, S.DueDate
, S.ShipDate
, S.Status
, S.PurchaseOrderNumber
, C.AccountNumber
, P.FirstName, P.MiddleName, P.LastName
FROM [Sales].[SalesOrderHeader] AS S
LEFT OUTER JOIN [Sales].[Customer] AS C ON C.CustomerID=S.CustomerID
LEFT OUTER JOIN [Person].[Person] AS P ON P.BusinessEntityID=C.PersonID
--append#2
) AS Src)
SELECT CEILING(TOTAL_ROWS/ CAST(@RowsPerPage AS DECIMAL(20,2))) AS TOTAL_PAGES
,*
FROM PAGE_ROWS
WHERE ROW_NO BETWEEN @StartRow AND @EndRow
ORDER BY OrderDate DESC, SalesOrderNumber ASC
Answer 5:
ALTER Proc [dbo].[Sp_PagingonTable]
@SearchText varchar(255) = null,
@ChannelName varchar(255)= null,
@ChannelCategory varchar(255)= null,
@ChannelType varchar(255)= null,
@PageNo int,
@PageSize int,
@TotalPages int output
As
DECLARE @VariableTable TABLE
(
Rownumber INT,
ReferralHierarchyKey BIGINT,
ReferralID VARCHAR(255),
ChannelDetail VARCHAR(255),
ChannelName VARCHAR(255),
ChannelCategory VARCHAR(255),
ChannelType VARCHAR(255)
)
/*---Inserting Data into variable Table-------------*/
INSERT INTO @VariableTable
SELECT
ROW_NUMBER() OVER(ORDER BY [ColumnID) as Rownumber,*
FROM [dbo].[TableName]
WHERE (@SearchText IS NULL OR ChannelDetail LIKE '%' + @SearchText + '%') And (@ChannelName IS NULL OR ChannelName = @ChannelName )
/*--Applying Paging on filter Table--*/
SELECT
ReferralID
,ChannelDetail
,ChannelName
,ChannelCategory
,ChannelType
FROM
@VariableTable
WHERE Rownumber between (((@PageNo -1) *@PageSize)+1) and @PageNo * @PageSize
/*--Getting Total Pages After filter Table---*/
SELECT @TotalPages = (Count(*) + @PageSize - 1)/@PageSize FROM @VariableTable
SELECT @TotalPages
Answer 6:
我喜欢塔哈西迪基的答案,只是它需要修改查询过去了,有没有为我必须使用SQL UNION语句由于一个前同事提出了一些非常糟糕的设计决策工作。
通用SQL Server查询是:
SELECT * FROM (
select ROW_NUMBER() OVER (order by ID) as row_num, * FROM (
<<Put Your Query Here>>
) AS tempTable1
) AS tempTable2 WHERE row_num >= ((pageNum -1) * pageSize) AND row_num < ((pageNum -1) * pageSize) + pageSize;
我创建了一个假设为基础的一个寻呼Java函数:
public static String buildPagingQuery(String sqlStr, String sortExpression, int pageNum, int pageSize) {
if (StringUtils.isBlank(sortExpression)) { //NOTE: uses org.apache.commons.lang.StringUtils
sortExpression = " (select 0)";
}
int startIndex = ((pageNum - 1) * pageSize) + 1;
int endIndex = startIndex + pageSize;
StringBuilder sb = new StringBuilder();
sb.append("SELECT * FROM (");
sb.append("SELECT ROW_NUMBER() OVER (ORDER BY ");
sb.append(sortExpression);
sb.append(") as row_num, * FROM (");
sb.append(sqlStr);
sb.append(") as tempTable1 ");
sb.append(") AS tempTable2 ");
sb.append("WHERE row_num >= ").append(startIndex);
sb.append(" AND row_num < ").append(endIndex);
return sb.toString();
}
我还没有检查了一大桌的表现。
Answer 7:
您可以使用从以下类的方法
internal class PagingHelper
{
public static String ParseQueryForPagingAndSorting(String strSQL, string SortExpression, int StartIndex, int EndIndex)
{
if (String.IsNullOrEmpty(SortExpression))
SortExpression = " (select 0)";
StringBuilder sb = new StringBuilder();
sb.Append("select * from (");
sb.Append(" select ROW_NUMBER() OVER (ORDER BY " + SortExpression + ") AS row_num,");
int index = strSQL.ToLower().IndexOf('t', 0);
sb.Append(strSQL.Substring(index + 2));
sb.Append(")");
sb.Append(" AS TempTable");
sb.Append(" where row_num>=" + StartIndex.ToString() + " AND row_num<=" + EndIndex.ToString());
return sb.ToString();
}
public static String ParseQueryForCount(String strSQL)
{
StringBuilder sb = new StringBuilder();
sb.Append("select count(*) from");
sb.Append("(");
sb.Append(strSQL);
sb.Append(")");
sb.Append(" AS TempTable");
return sb.ToString();
}
}
Answer 8:
有一个我发现这样做到SQL Server 2012这个法子
http://raresql.com/2012/07/01/sql-paging-in-sql-server-2012-using-order-by-offset-and-fetch-next/
文章来源: SQL Server paging query