1.利用Not In和SELECT TOP分页
SELECT TOP 10 * FROM Table_A WHERE Id NOT IN (SELECT TOP 20 id FROM Table_A ORDER BY id )) ORDER BY ID
2.利用ID大于多少和SELECT TOP分页
SELECT TOP 10 * FROM Table_A WHERE (ID > (SELECT MAX(id) FROM (SELECT TOP 20 id FROM Table_A ORDER BY id) Table_alian))
3.利用SQL的游标存储过程分页
Oracle:
create or replace procedure getPage(
pageSize integer, --每页记录数
pageNo integer, --当前页码,从 1 开始
sqlQuery varchar2, --查询语句,含排序部分
rs out sys_refcursor, --返回的记录集
rowCount out integer, --返回总记录数
pageCount out integer --返回总页数
)
as
sqlString varchar2(30000);
startRowNum integer;
endRowNum integer;
pageNumber integer;
begin
----取记录总数
sqlString := 'select count(*) from (' || sqlQuery || ')';
execute immediate sqlString into rowCount;
if pageNo > 0 then
----计算
pageNumber := pageNo;
pageCount := ceil(1.0 * rowCount / PageSize);
if pageNumber > pageCount then
pageNumber := pageCount;
-- else
-- pageNumber := ( pageCount - 1 ) ;
end if;
----执行分页查询
--注意对rownum别名的使用,第一次直接用rownum,第二次一定要用别名rn
startRowNum := pageNumber * pageSize;
endRowNum := startRowNum - pageSize + 1;
sqlString := 'SELECT * FROM (
SELECT A.*, rownum rn
FROM ('|| sqlQuery ||') A
WHERE rownum <= '|| to_char(startRowNum) || ' ) B
WHERE rn >= ' || to_char(endRowNum) ;
--dbms_output.put_line(sqlString);
else
sqlString := 'SELECT * FROM ( '|| sqlQuery ||') A';
end if;
OPEN rs FOR sqlString;
--dbms_output.put_line(sqlString);
--dbms_output.put_line(rowCount);
--dbms_output.put_line(pageCount);
end getPage;
SQL SERVER:
CREATE PROCEDURE [dbo].[GetDataRecordFromPage]
@SelectList VARCHAR(2000), --欲选择字段列表
@TableSource VARCHAR(100), --表名或视图表
@SearchCondition VARCHAR(2000), --查询条件
@OrderExpression VARCHAR(1000), --排序表达式
@PageIndex INT = 1, --页号,从0开始
@PageSize INT = 10 --页尺寸
AS
BEGIN
IF @SelectList IS NULL OR LTRIM(RTRIM(@SelectList)) = ''
BEGIN
SET @SelectList = '*'
END
PRINT @SelectList
SET @SearchCondition = ISNULL(@SearchCondition,'')
SET @SearchCondition = LTRIM(RTRIM(@SearchCondition))
IF @SearchCondition <> ''
BEGIN
IF UPPER(SUBSTRING(@SearchCondition,1,5)) <> 'WHERE'
BEGIN
SET @SearchCondition = 'WHERE ' + @SearchCondition
END
END
PRINT @SearchCondition
SET @OrderExpression = ISNULL(@OrderExpression,'')
SET @OrderExpression = LTRIM(RTRIM(@OrderExpression))
IF @OrderExpression <> ''
BEGIN
IF UPPER(SUBSTRING(@OrderExpression,1,5)) <> 'WHERE'
BEGIN
SET @OrderExpression = 'ORDER BY ' + @OrderExpression
END
END
PRINT @OrderExpression
IF @PageIndex IS NULL OR @PageIndex < 1
BEGIN
SET @PageIndex = 1
END
PRINT @PageIndex
IF @PageSize IS NULL OR @PageSize < 1
BEGIN
SET @PageSize = 10
END
PRINT @PageSize
DECLARE @SqlQuery VARCHAR(4000)
SET @SqlQuery='SELECT '+@SelectList+',RowNumber
FROM
(SELECT ' + @SelectList + ',ROW_NUMBER() OVER( '+ @OrderExpression +') AS RowNumber
FROM '+@TableSource+' '+ @SearchCondition +') AS RowNumberTableSource
WHERE RowNumber BETWEEN ' + CAST(((@PageIndex - 1)* @PageSize+1) AS VARCHAR)
+ ' AND ' +
CAST((@PageIndex * @PageSize) AS VARCHAR)
-- ORDER BY ' + @OrderExpression
PRINT @SqlQuery
SET NOCOUNT ON
EXECUTE(@SqlQuery)
SET NOCOUNT OFF
RETURN @@RowCount
END
4.利用left join
select top 10 * from Table_A left join (select top 10 id from Table_A ) Table_B where Table_B.id is null;
5.利用order by,不过这种速度不行
select top 10 * from (select * from (select top 20 * from Table_A order by id asc) Table_B order by Table_B desc) Table_C order by Table_C.id;
6.如果确定分页只有一两页,不会太多,还不如直接读取出来在程序里边自己分页。