整理一下自己在做项目时用到的各数据库分页存储过程
SQL Server2000分页存储过程:
Create procedure P_Page_Data
(
@currentpageindex int=1 ,
@pagesize int=10,
@countRecord int output
)
As
declare @currentPageSize int
DECLARE @sqlStr nvarchar(1000)
set @currentPageSize=@currentpageindex * @pagesize;
Begin
set @sqlStr='select top ' + Convert(varchar(50),@pagesize) + ' * from (select top ' + Convert(varchar(50),@currentPageSize) + ' * from computer order by id asc) as tableA order by id desc'
set @countrecord =(select count(id) from computer)
EXEC (@sqlStr)
End
DECLARE @countrecord int
exec P_Page_Data 1,10,@countrecord OUTPUT
Sql Server2005分页存储过程：
Create procedure P_Page_Data
(
@currentpageindex int=1 ,
@pagesize int=10,
@countRecord int output
)
As
declare @currentPageSize int
DECLARE @sqlStr nvarchar(1000)
set @currentPageSize=@currentpageindex * @pagesize;
Begin
set @sqlStr='SELECT * FROM (SELECT ROW_NUMBER() OVER (ORDER BY id desc) AS rownum, * FROM computer ) a WHERE rownum >= ' + Convert(varchar(50),@currentPageSize-@pagesize+1) + 'and rownum <= ' + Convert(varchar(50),@currentPageSize)
set @countrecord =(select count(id) from computer)
EXEC (@sqlStr)
End
DECLARE @countrecord int
exec P_Page_Data 2,10,@countrecord OUTPUT
Oracle10G分页存储过程:
1.
create or replace procedure P_PagerSum(p_PageSize number, --每页记录数
p_PageNo number, --当前页码,从 1 开始
p_SqlSelect varchar2, --查询语句,含排序部分
p_OutRecordCount out number,--返回总记录数
cur_OUT out GM.Pager.refCursorType)
as
v_sql varchar2(3000);
v_count number;
v_heiRownum number;
v_lowRownum number;
begin
----取记录总数
v_sql := 'select count(*) from (' || p_SqlSelect || ')';
execute immediate v_sql into v_count;
p_OutRecordCount := v_count;
----执行分页查询
v_heiRownum := p_PageNo * p_PageSize;
v_lowRownum := v_heiRownum - p_PageSize + 1;
v_sql := 'SELECT *
FROM (
SELECT A.*, rownum rn
FROM ('|| p_SqlSelect ||') A
WHERE rownum <= '|| to_char(v_heiRownum) || '
) B
WHERE rn >= ' || to_char(v_lowRownum) ;
--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
OPEN cur_OUT FOR v_sql;
end P_PagerSum;
2.
create or replace procedure P_PAGERSUMTEST(p_PageSize number, --每页记录数
p_PageNo number, --当前页码,从 1 开始
p_SqlSelectFirst varchar2, --查询语句,含排序部分
p_SqlSelectEnd varchar2,
p_OutRecordCount out number,--返回总记录数
cur_OUT out GM.Pager.refCursorType)
as
v_sql varchar2(4000);
v_count number;
v_heiRownum number;
v_lowRownum number;
begin
----取记录总数
v_sql := 'select count(*) from (' || p_SqlSelectFirst || p_SqlSelectEnd || ')';
execute immediate v_sql into v_count;
p_OutRecordCount := v_count;
----执行分页查询
v_heiRownum := p_PageNo * p_PageSize;
v_lowRownum := v_heiRownum - p_PageSize + 1;
v_sql := 'SELECT *
FROM (
SELECT A.*, rownum rn
FROM ('|| p_SqlSelectFirst || p_SqlSelectEnd || ') A
WHERE rownum <= '|| to_char(v_heiRownum) || '
) B
WHERE rn >= ' || to_char(v_lowRownum) ;
--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
OPEN cur_OUT FOR v_sql;
end P_PAGERSUMTEST;
Oracle10G的分页存储过程有两个之间的区别只是将请求的SQL语句分半，防止传递超长SQL语句（4000个字符以上时，测试时超过三千个字符都报错误）时ORACLE报错误。这个问题在项目中可苦恼了很长时间，都无法解决，最后才想到可以将SQL语句分段处理。