基本的思路有如下幾種:
- 從12.5.3版本開始sybase支持top關鍵字,試著使用,但是未果(同事說sybase對top支持不好),因為不支持嵌套。使用的是如下的sql:
select top 10 t1.AH, t1.BH from K_ZS..B_MS t1 where t1.BH not in (select top 20 t2.BH from K_ZS..B_MS t2)這里的是不帶order by的,另外一種是帶order by的,效率會比較高。
- 在存儲過程端使用set rowcount 來實現分頁,沒有試驗。
- 用存儲過程,建立臨時表,獲取數據,然后動態sql獲得臨時表數據。最后從網上找到的如下的兩個分頁存儲過程:
-- 按行讀取
CREATE PROCEDURE GetDataByLine
(
--創建一個分頁讀取過程
@SqlStr varchar(8000), --SQL語句
@FirstRec int, --頁起始行
@LastRec int --頁結束行
)
AS
DECLARE @dt varchar(10) --生成臨時表的隨機數
BEGIN
SELECT @dt= substring(convert(varchar, rand()), 3, 10) --一個字符型的隨機數
--將搜索結果放入臨時表中,表名隨機生成,在' FROM '前插入'INTO '+隨機臨時表名
SELECT @SqlStr = stuff(@SqlStr, charindex(' FROM ', upper(@SqlStr)), 6 ,' INTO tempdb..Lining' + @dt + ' FROM ')
EXECUTE (@SqlStr)
--為臨時表增加id號
SELECT @SqlStr = 'ALTER TABLE tempdb..Lining' + @dt + ' ADD TEMPDB_ID numeric(10) IDENTITY PRIMARY KEY'
EXECUTE (@SqlStr)
--計算臨時表中的記錄數
--SELECT @SqlStr = 'SELECT Count(*) From tempdb..Lining' + @dt
--EXECUTE (@SqlStr)
--選取記錄號在起始行和結束行中間的記錄
SELECT @SqlStr = 'SELECT * FROM tempdb..Lining'+@dt+' WHERE TEMPDB_ID > ' + convert(varchar, @FirstRec) + ' and TEMPDB_ID <= ' + convert(varchar, @LastRec)
EXECUTE (@SqlStr)
--刪除臨時表
SELECT @SqlStr = 'DROP TABLE tempdb..Lining'+@dt
EXECUTE (@SqlStr)
END
/*
some comments:
1.@SqlStr varchar(8000), depends on your page size
2. this is a generic paging sp, if you just want to use it for specific table,
you'd better change the 'tempdb..Lining' to #Paging, the performance will be better
*/
-- 按頁讀取
CREATE PROCEDURE GetDataByPage
(
--創建一個分頁讀取過程
@SqlStr varchar(8000), --SQL語句
@PageSize int, --每頁記錄數
@CurrentPage int --當前頁數
)
AS
DECLARE @FirstRec int, @LastRec int, @dt varchar(10) --頁起始行,頁結束行,生成臨時表的隨機數
BEGIN
SELECT @FirstRec = (@CurrentPage - 1) * @PageSize --計算頁起始行
SELECT @LastRec = (@CurrentPage * @PageSize + 1) --計算頁結束行
SELECT @dt= substring(convert(varchar,rand()),3,10) --一個字符型的隨機數
--將搜索結果放入臨時表中,表名隨機生成,在' FROM '前插入'INTO '+隨機臨時表名
SELECT @SqlStr = stuff(@SqlStr, charindex(' FROM ',upper(@SqlStr)), 6 ,' INTO tempdb..Paging'+@dt+' FROM ')
EXECUTE (@SqlStr)
--為臨時表增加id號
SELECT @SqlStr = 'ALTER TABLE tempdb..Paging'+@dt+' ADD TEMPDB_ID numeric(10) IDENTITY PRIMARY KEY'
EXECUTE (@SqlStr)
--計算臨時表中的記錄數
--SELECT @SqlStr = 'SELECT Count(*) From tempdb..Paging'+@dt
--EXECUTE (@SqlStr)
--選取記錄號在起始行和結束行中間的記錄
SELECT @SqlStr = 'SELECT * FROM tempdb..Paging'+@dt+' WHERE TEMPDB_ID > '+convert(varchar,@FirstRec)+' and TEMPDB_ID < '+convert(varchar,@LastRec)
EXECUTE (@SqlStr)
--刪除臨時表
SELECT @SqlStr = 'DROP TABLE tempdb..Paging'+@dt
EXECUTE (@SqlStr)
END
/*
some comments:
1. @SqlStr varchar(8000), depends on your page size
2. this is a generic paging sp, if you just want to use it for specific table,
you'd better change the 'tempdb..Paging' to #Paging, the performance will be better
*/
-- 清空日志
Dump Transaction DB_BD With truncate_only
go
use DB_BD
go
if exists( select 1 from sysobjects
where id = object_id( 'PR_GET_PAGESIZE' )
and sysstat & 15 = 4 )
drop procedure PR_GET_PAGESIZE
go
create procedure PR_GET_PAGESIZE (
@SqlStr varchar(8000), -- SQL語句
@PageSize int, -- 每頁記錄數
@CurrentPage int -- 當前頁數
)
as
begin
declare @FirstRec int, -- 頁起始行
@maxCount int, -- 頁結束行
@dt varchar(10) -- 生成臨時表的隨機數
select @FirstRec = (@CurrentPage - 1) * @PageSize -- 計算頁起始行
-- 將搜索結果放入臨時表中,表名隨機生成,在' from '前插入'into '+隨機臨時表名
select @SqlStr = stuff(@SqlStr, charindex(' from ',lower(@SqlStr)), 6,
', TEMPDB_ID = identity(11) into #temp_page from ')
-- 設置結束行
select @maxCount = @PageSize*@CurrentPage
select @SqlStr = 'set rowcount ' + convert(varchar, @maxCount)
+ ' ' + @SqlStr
+ ' set rowcount 0 '
-- 選取記錄號在起始行和結束行中間的記錄
select @SqlStr = @SqlStr + ' select * from #temp_page where TEMPDB_ID > ' + convert(varchar, @FirstRec)
print '%1!', @SqlStr
execute (@SqlStr)
end
go
sp_procxmode PR_GET_PAGESIZE, anymode
go
Dump Transaction DB_BD With truncate_only
go
use DB_BD
go
if exists( select 1 from sysobjects
where id = object_id( 'PR_GET_PAGESIZE' )
and sysstat & 15 = 4 )
drop procedure PR_GET_PAGESIZE
go
create procedure PR_GET_PAGESIZE (
@SqlStr varchar(8000), -- SQL語句
@PageSize int, -- 每頁記錄數
@CurrentPage int -- 當前頁數
)
as
begin
declare @FirstRec int, -- 頁起始行
@maxCount int, -- 頁結束行
@dt varchar(10) -- 生成臨時表的隨機數
select @FirstRec = (@CurrentPage - 1) * @PageSize -- 計算頁起始行
-- 將搜索結果放入臨時表中,表名隨機生成,在' from '前插入'into '+隨機臨時表名
select @SqlStr = stuff(@SqlStr, charindex(' from ',lower(@SqlStr)), 6,
', TEMPDB_ID = identity(11) into #temp_page from ')
-- 設置結束行
select @maxCount = @PageSize*@CurrentPage
select @SqlStr = 'set rowcount ' + convert(varchar, @maxCount)
+ ' ' + @SqlStr
+ ' set rowcount 0 '
-- 選取記錄號在起始行和結束行中間的記錄
select @SqlStr = @SqlStr + ' select * from #temp_page where TEMPDB_ID > ' + convert(varchar, @FirstRec)
print '%1!', @SqlStr
execute (@SqlStr)
end
go
sp_procxmode PR_GET_PAGESIZE, anymode
go