最近在公司做核心,原来的核心是oracle数据库的,现在改用sqlserver,没有rownum了,分页实现遇到问题了,我在网上也查了一些解决办法,都不是很顺手,不知道有没有更好的解决方法。row_number() over(order by xxx)这种方式必须要单独写出order by条件,不适合我们以前的核心思路,以往我们的核心就是PG拼好一个sql文调用就可以了,分页都是核心处理的,但是现在,用了row_number() over(order by xxx)sql文种不能加order by语句了,我很纠结!top吧只能去前多少条记录,遇到10-20这种就没法取了,有没有做过的达人帮帮忙。万分感谢啊!这是我现在的用法~SELECT *
FROM (SELECT row_number() over(order by A.rzid) as rownum, A.*
FROM (SELECT
*
FROM SYS_XTRZ log
) A
) B
WHERE B.rownum between 10 and 20;[
FROM (SELECT row_number() over(order by A.rzid) as rownum, A.*
FROM (SELECT
*
FROM SYS_XTRZ log
) A
) B
WHERE B.rownum between 10 and 20;[
SELECT *
FROM (SELECT row_number() over(order by rzid) as rownum,*
FROM SYS_XTRZ log
) B
WHERE rownum between 10 and 20
这种不行么?想排序就写在row_number() over (order by 排序字段)
因为我现在做的是公司核心函数,别的程序员要拼好sql文,直接调用就好了,他不需要知道我要分页等等,他只要给我sql文就行了,所以你这种方式是不行的,这个sql需要程序员自己加row_number() over (order by ,我就是想封装一下,让别的人不需要这样写,想看看有没有好的方法
SELECT *
FROM (SELECT row_number() over(order by A.rzid) as rownum, A.*
FROM (
--[usersql
) A
) B
WHERE B.rownum between 10 and 20;
[/code]
而且我在写共通函数的时候,rzid这个字段我是不知道的,我也不知道他要检索的是哪张表
主键是什么~
Create Procedure proc_CurrencyPage
(
@Columns varchar(max),
@TableName varchar(max),
@Condition varchar(max),
@OrderBy varchar(max),
@PageNum int,
@PageSize int,
@PageCount int output,
@RecordCount bigint output
)
AS
DECLARE @Sql nvarchar(max);
Set @Sql = 'Select @CountOut = Count(*) From ' + @TableName + ' Where ' + @Condition;
EXEC sp_executesql @Sql,N'@CountOut INT OUTPUT',@CountOut = @RecordCount OUTPUT; Set @PageCount = @RecordCount / @PageSize;
IF(@RecordCount % @PageSize > 0) Set @PageCount = @PageCount + 1;
IF(@PageNum < 1) Set @PageNum = 1;
IF(@PageNum > @PageCount) Set @PageNum = @PageCount;
Declare @BRowNum int,@ERowNum int;
Set @BRowNum = (@PageNum - 1) * @PageSize;
Set @ERowNum = @BRowNum + @PageSize;
Set @Sql =
'Select * From (
Select '+@Columns+', ROW_NUMBER() Over(Order By ' + @OrderBy + ') As RowNum
From ' + @TableName + '
Where ' + @Condition + '
) as TempT
Where RowNum > ' + Convert(varchar(10),@BRowNum) + '
And
RowNum <= ' + Convert(varchar(10),@ERowNum) + '
Order By ' + @OrderBy;
Exec(@Sql);
GO楼主是想要个分页储存过程吧?
--创建个测试表
create table test0810(id int primary key)
insert into test0810
select a.col*1000+b.col*100+c.col*10+d.col+1 as col
from
(select 0 as col union all select 1 union all select 2 union all
select 3 union all select 4 union all select 5 union all
select 6 union all select 7 union all select 8 union all select 9)a
cross join
(select 0 as col union all select 1 union all select 2 union all
select 3 union all select 4 union all select 5 union all
select 6 union all select 7 union all select 8 union all select 9)b
cross join
(select 0 as col union all select 1 union all select 2 union all
select 3 union all select 4 union all select 5 union all
select 6 union all select 7 union all select 8 union all select 9)c
cross join
(select 0 as col union all select 1 union all select 2 union all
select 3 union all select 4 union all select 5 union all
select 6 union all select 7 union all select 8 union all select 9)d
order by col
FROM (SELECT row_number() over(order by getdate()) as rownum, A.*
FROM (
--[usersql
) A
) B
WHERE B.rownum between 10 and 20;
--使用实例
Declare @Columns varchar(max)
Declare @TableName varchar(max)
Declare @Condition varchar(max)
Declare @OrderBy varchar(max)
Declare @PageNum int
Declare @PageSize int
Declare @PageCount int
Declare @RecordCount bigintset @Columns = 'ID'
set @TableName = 'test0810'
set @Condition = '1 = 1'
set @ORDERBY = 'ID' --如果有多列自己写例如'name desc,id'
set @PageNum = 2
set @PageSize=20Exec proc_CurrencyPage @Columns,@TableName,@Condition,
@ORDERBY,@PageNum,@PageSize,@PageCount output,@RecordCount output
select @PageCount,@RecordCount
set QUOTED_IDENTIFIER ON
goALTER PROC [dbo].[PROCE_PageView2000]
(
@tbname nvarchar(100), --要分页显示的表名
@FieldKey nvarchar(1000), --用于定位记录的主键(惟一键)字段,可以是逗号分隔的多个字段
@PageCurrent int=1, --要显示的页码
@PageSize int=10, --每页的大小(记录数)
@FieldShow nvarchar(1000)='', --以逗号分隔的要显示的字段列表,如果不指定,则显示所有字段
@FieldOrder nvarchar(1000)='', --以逗号分隔的排序字段列表,可以指定在字段后面指定DESC/ASC
@WhereString nvarchar(1000)=N'', --查询条件
@RecordCount int OUTPUT --总记录数
)
AS
SET NOCOUNT ON
--检查对象是否有效
--IF OBJECT_ID(@tbname) IS NULL
--BEGIN
-- RAISERROR(N'对象"%s"不存在',1,16,@tbname)
-- RETURN
--END
--IF OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsTable')=0
-- AND OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsView')=0
-- AND OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsTableFunction')=0
--BEGIN
-- RAISERROR(N'"%s"不是表、视图或者表值函数',1,16,@tbname)
-- RETURN
--END--分页字段检查
IF ISNULL(@FieldKey,N'')=''
BEGIN
RAISERROR(N'分页处理需要主键(或者惟一键)',1,16)
RETURN
END--其他参数检查及规范
IF ISNULL(@PageCurrent,0)<1 SET @PageCurrent=1
IF ISNULL(@PageSize,0)<1 SET @PageSize=10
IF ISNULL(@FieldShow,N'')=N'' SET @FieldShow=N'*'
IF ISNULL(@FieldOrder,N'')=N''
SET @FieldOrder=N''
ELSE
SET @FieldOrder=N'ORDER BY '+LTRIM(@FieldOrder)
IF ISNULL(@WhereString,N'')=N''
SET @WhereString=N''
ELSE
SET @WhereString=N'WHERE ('+@WhereString+N')'--如果@RecordCount为NULL值,则计算总页数(这样设计可以只在第一次计算总页数,以后调用时,把总页数传回给存储过程,避免再次计算总页数,对于不想计算总页数的处理而言,可以给@RecordCount赋值)
IF @RecordCount IS NULL
BEGIN
DECLARE @sql nvarchar(4000)
SET @sql=N'SELECT @RecordCount=COUNT(*)'
+N' FROM '+@tbname
+N' '+@WhereString
EXEC sp_executesql @sql,N'@RecordCount int OUTPUT',@RecordCount OUTPUT
END--计算分页显示的TOPN值
DECLARE @TopN varchar(20),@TopN1 varchar(20)
SELECT @TopN=@PageSize,
@TopN1=(@PageCurrent-1)*@PageSize--第一页直接显示
IF @PageCurrent=1
EXEC(N'SELECT TOP '+@TopN
+N' '+@FieldShow
+N' FROM '+@tbname
+N' '+@WhereString
+N' '+@FieldOrder)
ELSE
BEGIN
--处理别名
IF @FieldShow=N'*'
SET @FieldShow=N'a.*' --生成主键(惟一键)处理条件
DECLARE @Where1 nvarchar(4000),@Where2 nvarchar(4000),
@s nvarchar(1000),@Field sysname
SELECT @Where1=N'',@Where2=N'',@s=@FieldKey
WHILE CHARINDEX(N',',@s)>0
SELECT @Field=LEFT(@s,CHARINDEX(N',',@s)-1),
@s=STUFF(@s,1,CHARINDEX(N',',@s),N''),
@Where1=@Where1+N' AND a.'+@Field+N'=b.'+@Field,
@Where2=@Where2+N' AND b.'+@Field+N' IS NULL',
@WhereString=REPLACE(@WhereString,@Field,N'a.'+@Field),
@FieldOrder=REPLACE(@FieldOrder,@Field,N'a.'+@Field),
@FieldShow=REPLACE(@FieldShow,@Field,N'a.'+@Field)
SELECT @WhereString=REPLACE(@WhereString,@s,N'a.'+@s),
@FieldOrder=REPLACE(@FieldOrder,@s,N'a.'+@s),
@FieldShow=REPLACE(@FieldShow,@s,N'a.'+@s),
@Where1=STUFF(@Where1+N' AND a.'+@s+N'=b.'+@s,1,5,N''),
@Where2=CASE
WHEN @WhereString='' THEN N'WHERE ('
ELSE @WhereString+N' AND ('
END+N'b.'+@s+N' IS NULL'+@Where2+N')' --执行查询
EXEC(N'SELECT TOP '+@TopN
+N' '+@FieldShow
+N' FROM '+@tbname
+N' a LEFT JOIN(SELECT TOP '+@TopN1
+N' '+@FieldKey
+N' FROM '+@tbname
+N' a '+@WhereString
+N' '+@FieldOrder
+N')b ON '+@Where1
+N' '+@Where2
+N' '+@FieldOrder)
END
MSSQL2005set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
ALTER PROCEDURE [dbo].[PROCE_SQL2005PAGECHANGE]
(
@TableName varchar(50), --表名
@ReFieldsStr varchar(200) = '*', --字段名(全部字段为*)
@OrderString varchar(200), --排序字段(必须!支持多字段不用加order by)
@WhereString varchar(500) =N'', --条件语句(不用加where)
@PageSize int, --每页多少条记录
@PageIndex int = 1 , --指定当前为第几页
@TotalRecord int output --返回总记录数
)
AS
BEGIN --处理开始点和结束点
Declare @StartRecord int;
Declare @EndRecord int;
Declare @TotalCountSql nvarchar(500);
Declare @SqlString nvarchar(2000);
set @StartRecord = (@PageIndex-1)*@PageSize + 1
set @EndRecord = @StartRecord + @PageSize - 1
SET @TotalCountSql= N'select @TotalRecord = count(*) from ' + @TableName;--总记录数语句
SET @SqlString = N'(select row_number() over (order by '+ @OrderString +') as rowId,'+@ReFieldsStr+' from '+ @TableName;--查询语句
--
IF (@WhereString! = '' or @WhereString!=null)
BEGIN
SET @TotalCountSql=@TotalCountSql + ' where '+ @WhereString;
SET @SqlString =@SqlString+ ' where '+ @WhereString;
END
--第一次执行得到
--IF(@TotalRecord is null)
-- BEGIN
EXEC sp_executesql @totalCountSql,N'@TotalRecord int out',@TotalRecord output;--返回总记录数
-- END
----执行主语句
set @SqlString ='select * from ' + @SqlString + ') as t where rowId between ' + ltrim(str(@StartRecord)) + ' and ' + ltrim(str(@EndRecord));
Exec(@SqlString)
END
我是想用这种方式的,可是我的usersql那里依旧不能写order by 语句的,因为实际业务是肯定需要order by的,是不是那样的话就不能用这种方式了~
非常感谢你的回答,但其实写存储过程和我用c#代码自己拼sql语句是一样的效果,你的这个过程也是需要单独的传递order by条件的。
protected DataSet select(SqlConnection con, string sqlStr, int page , string orderStr)
{
if (string.IsNullOrEmpty(orderStr))
{
throw new Exception("排序字符串不能为空");
} int srownum = 0; //开始番号
int erownum = 0; //结束番号 StringBuilder SqlBuilder = new StringBuilder(); //总页数的取得
SqlBuilder.Append("SELECT COUNT(1) AS CNT FROM (");
SqlBuilder.Append(sqlStr);
SqlBuilder.Append(") AS A"); DataSet ds = SqlHelper.ExecuteDataset(con,CommandType.Text, SqlBuilder.ToString()); int iCount = Convert.ToInt32(ds.Tables[0].Rows[0][0]); int modCount = iCount % Constants.PAGE_ITEM_NUM; if(modCount == 0)
{
PageCout = iCount / Constants.PAGE_ITEM_NUM;
}
else
{
PageCout = iCount / Constants.PAGE_ITEM_NUM + 1;
} if (page < 1) {
page = 1;
}
else if (page > PageCout)
{
page = PageCout;
} CurrentPage = page; //数据的检索
SqlBuilder = new StringBuilder();
if (iCount > 0) {
srownum = ((page - 1) * Constants.PAGE_ITEM_NUM) + 1;
erownum = page * Constants.PAGE_ITEM_NUM;
SqlBuilder.Append("SELECT * FROM ( SELECT row_number() over(order by "+ orderStr +") rownum,A.* FROM (");
SqlBuilder.Append(sqlStr);
SqlBuilder.Append(")");
SqlBuilder
.Append("A ) B WHERE rownum BETWEEN ")
.Append(srownum)
.Append(" AND ")
.Append(erownum);
} else {
SqlBuilder.Append(sqlStr);
} return SqlHelper.ExecuteDataset(con, CommandType.Text, SqlBuilder.ToString());
}这是我现在写好的函数,我其实就是希望不加order by 这个参数,因为以前oracle写的时候就是直接加在sqlStr这个参数里面的,不需要单独列出来