实例讲解"Oracle"数据库的分页显示

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• 数据库
• 讲解
• 实例
• --the
• ProductId
• o

Create PROCEDURE pageTest --用于翻页的测试

--需要把排序字段放在第一列

(

@FirstID nvarchar(20)=null, --当前页面里的第一条记录的排序字段的值

@LastID nvarchar(20)=null, --当前页面里的最后一条记录的排序字段的值

@isNext bit=null, --true 1 :下一页；false 0:上一页

@allCount int output, --返回总记录数

@pageSize int output, --返回一页的记录数

@CurPage int --页号（第几页）0：第一页；-1最后一页。

)

AS

if @CurPage=0

begin

--统计总记录数

select @allCount=count(ProductId) from Product_test

set @pageSize=10

--返回第一页的数据

select top 10

ProductId,

ProductName,

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from Product_test order by ProductId

end

else if @CurPage=-1

select * from

(select top 10 ProductId,

ProductName,

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from Product_test order by ProductId desc ) as aa

order by ProductId

else

begin

if @isNext=1

--翻到下一页

select top 10 ProductId,

ProductName,

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from Product_test where ProductId > @LastID order by ProductId

else

--翻到上一页

select * from

(select top 10 ProductId,

ProductName,

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from Product_test where ProductId < @FirstID order by ProductId desc) as bb order by ProductId

end

*******************************************************************************************************

CREATE OR REPLACE PROCEDURE TABLEPAGE_SELECT(v_page_sizeint, --the size of a page of list

v_current_page int, --the current page of list

v_table_name varchar2, --the talbe name

v_order_fieldvarchar2,--the order field

v_order_sequence varchar2,--the order sequence should by "_desc"or "_asc",_is blank.

--v_sql_select varchar2, --the select sql for procedure

--v_sql_countvarchar2, --the count sql for procedure

--v_out_recordcount OUT int, --the num of return rows

p_cursor OUT refcursor_pkg.return_cursor) as

v_sql varchar2(3000); --the sql for select all rows of list

v_sql_count varchar2(3000); --the count sql for procedure

v_sql_order varchar2(2000); --the order of list

v_count int; -- the amount rows fo original list

v_endrownum int; --the end row num of the current page

v_startrownum int; --the start row num of the current page

BEGIN

----set the order of list

ifv_order_field!='NO' then

v_sql_order :=' ORDER BY '|| v_order_field ||' '||v_order_sequence;

else

v_sql_order :='';

end if;

----catch the amount rows of list

v_sql_count:='SELECT COUNT(ROWNUM) FROM '||v_table_name;

execute immediate v_sql_count into v_count;

-- v_out_recordcount := v_count;

----set the value of start and end row

if v_order_sequence='desc' then

v_endrownum:=v_count-(v_current_page-1)*v_page_size;

v_startrownum:=v_endrownum - v_page_size + 1;

else

v_endrownum:= v_current_page * v_page_size;

v_startrownum := v_endrownum - v_page_size + 1; #p#分页标题#e#

end if;

----the sql for page slide

v_sql := 'SELECT * FROM (SELECT '||v_table_name||'.*, rownum rn FROM '||v_table_name||' WHERE rownum <= ' ||

to_char(v_endrownum) ||' '|| v_sql_order||')WHERE rn >= ' ||

to_char(v_startrownum)||' '||v_sql_order;

open p_cursor for v_sql;

END TABLEPAGE_SELECT;