CREATE PROC myx_prPageRecordset @queryStr nvarchar(1000), @keyField nvarchar (200), @pageSize int, @pageNumber int AS BEGIN DECLARE @sqlText AS nvarchar(4000) DECLARE @sqlTable AS nvarchar(4000) SET @sqlTable = 'SELECT TOP ' + CAST((@pageNumber + 1) * @pageSize AS varchar(30)) + ' ' + @queryStr SET @sqlText = 'SELECT TOP ' + CAST(@pageSize AS varchar(30)) + ' * ' + 'FROM (' + @sqlTable + ') AS tableA ' + 'WHERE ' + @keyField + ' NOT IN(SELECT TOP ' + CAST(@pageNumber * @pageSize AS varchar(30)) + ' ' + @keyField + ' FROM (' + @sqlTable + ') AS tableB)' EXEC (@sqlText) END
GO
核心代碼 Dim strsql As String myComm = New SqlClient.SqlCommand("myx_prPageRecordset", myConn) myComm.CommandType = CommandType.StoredProcedure myComm.Parameters.Add(New SqlClient.SqlParameter("@queryStr", SqlDbType.NVarChar, 1000)) myComm.Parameters("@queryStr").Value = " * from tbpage order by id DESC" myComm.Parameters.Add(New SqlClient.SqlParameter("@keyField", SqlDbType.NVarChar, 200)) myComm.Parameters("@keyField").Value = "[id]" myComm.Parameters.Add(New SqlClient.SqlParameter("@pageSize", SqlDbType.NVarChar, 1000)) myComm.Parameters("@pageSize").Value = PageSize myComm.Parameters.Add(New SqlClient.SqlParameter("@pageNumber", SqlDbType.NVarChar, 1000)) myComm.Parameters("@pageNumber").Value = myPage - 1
呵呵,執行幾W條的代碼只需150毫秒左右
建立一個test(id,name,fid) 向test添充幾十條數據,使id=1,2,3,4.........(即遞增的integer),其他任意 在T-sql Debugger給改存儲過程分別傳遞如下參數: @queryStr= * from test @keyField=[ID] @pageSize=3 @pageNumber=1 問題出來了,看輸出結果(注意id): id name fid 4 kwklover 2 5 kwklover 2 6 kwklover 2 根據傳入參數,我們的預期應該是: id name fid 1 kwklover 2 2 kwklover 2 3 kwklover 2
下面是我參照小春的存儲分頁寫的分頁存儲過程,可以解決上面的問題: CREATE Procedure prGetRecordByPage ( @PageSize int, --每頁的記錄條數 @PageNumber int, --當前頁面 @QuerySql varchar(1000),--部分查詢字符串,如* From Test order by id desc @KeyField varchar(500) ) AS Begin
Declare @SqlTable AS varchar(1000) Declare @SqlText AS Varchar(1000)
Set @SqlTable='Select Top '+CAST(@PageNumber*@PageSize AS varchar(30))+' '+@QuerySql Set @SqlText='Select Top '+Cast(@PageSize AS varchar(30))+' * From ' +'('+@SqlTable+') As TembTbA ' +'Where '+@KeyField+' Not In (Select Top '+CAST((@PageNumber-1)*@PageSize AS varchar(30))+' '+@KeyField+' From ' +'('+@SqlTable+') AS TempTbB)' Exec(@SqlText)
