對數據庫的操作基本上就四種：Insert、Update、Delete和Select，而Update和Insert兩種操作又可以作簡單的合併，這樣下來，基本上一個數據表對應三個存儲過程便可以完成絕大多數的數據庫操作。存儲過程命名規則：Operate_TableName。比如表Order_Info對應三個存儲過程：AddEdit_Order_Info、Delete_Order_Info、Search_Order_Info，下面先列出相關代碼，然後作總體分析。
一、AddEdit_Order_Info
/*************************************************************
** Name : AddEdit_Order_Info
** Creater : PPCoder Designed By PPCode Studio(PPTech.Net)
** Create Date : 2004-9-6 8:30:17
** Modifer : Rexsp
** Modify Date : 2004-9-6 8:30:17
** Description : AddEdit information for Order_Info
**************************************************************/
ALTER PROCEDURE dbo.AddEdit_Order_Info
(
@OrderStateID Int = -1,
@OrderStateID_Min Int = -1,
@OrderStateID_Max Int = -1,
@OrderUserID Int = -1,
@OrderUserID_Min Int = -1,
@OrderUserID_Max Int = -1,
@OrderID Int = -1,
@OrderID_Min Int = -1,
@OrderID_Max Int = -1,
@ProductID Int = -1,
@ProductID_Min Int = -1,
@ProductID_Max Int = -1,
@CustomizeID Int = -1,
@CustomizeID_Min Int = -1,
@CustomizeID_Max Int = -1,
@OutID INT = 0 OUTPUT
)
AS
IF @OrderID=-1
BEGIN
INSERT INTO [Order_Info] (
[OrderStateID],
[OrderUserID],
[ProductID],
[CustomizeID]
)
VALUES(
@OrderStateID,
@OrderUserID,
@ProductID,
@CustomizeID
)
Set @OutID = @@IDENTITY
END
ELSE
BEGIN
DECLARE @strSQL NVARCHAR(1000)
SET @strSQL = 'UPDATE [Order_Info] SET @tmpOrderID = @tmpOrderID'
IF @OrderStateID <> -1
BEGIN
SET @strSQL = @strSQL + ', [OrderStateID] = @tmpOrderStateID'
END
IF @OrderUserID <> -1
BEGIN
SET @strSQL = @strSQL + ', [OrderUserID] = @tmpOrderUserID'
END
IF @ProductID <> -1
BEGIN
SET @strSQL = @strSQL + ', [ProductID] = @tmpProductID'
END
IF @CustomizeID <> -1
BEGIN
SET @strSQL = @strSQL + ', [CustomizeID] = @tmpCustomizeID'
END
SET @strSQL = @strSQL + ' WHERE [OrderID] = @tmpOrderID'
BEGIN TRAN
EXECUTE sp_executesql @strSQL, N'
@tmpOrderStateID INT,
@tmpOrderUserID INT,
@tmpOrderID INT,
@tmpProductID INT,
@tmpCustomizeID INT',
@tmpOrderStateID=@OrderStateID,
@tmpOrderUserID=@OrderUserID,
@tmpOrderID=@OrderID,
@tmpProductID=@ProductID,
@tmpCustomizeID=@CustomizeID
Set @OutID = @OrderID
IF @@error!=0
BEGIN
ROLLBACK
END
ELSE
BEGIN
COMMIT
END
END
RETURN
二、Delete_Order_Info
/*************************************************************
** Name : Delete_Order_Info
** Creater : PPCoder Designed By PPCode Studio(PPTech.Net)
** Create Date : 2004-9-6 8:30:17
** Modifer : Rexsp
** Modify Date : 2004-9-6 8:30:17
** Description : Delete information for Order_Info
**************************************************************/
ALTER PROCEDURE dbo.Delete_Order_Info
(
@OrderStateID Int = -1,
@OrderStateID_Min Int = -1,
@OrderStateID_Max Int = -1,
@OrderUserID Int = -1,
@OrderUserID_Min Int = -1,
@OrderUserID_Max Int = -1,
@OrderID Int = -1,
@OrderID_Min Int = -1,
@OrderID_Max Int = -1,
@ProductID Int = -1,
@ProductID_Min Int = -1,
@ProductID_Max Int = -1,
@CustomizeID Int = -1,
@CustomizeID_Min Int = -1,
@CustomizeID_Max Int = -1,
@OutID INT = 0 OUTPUT
)
AS
DECLARE @strSQL NVARCHAR(1000)
SET @strSQL = 'DELETE FROM [Order_Info] WHERE @tmpOrderID = @tmpOrderID '
IF @OrderStateID<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderStateID = @tmpOrderStateID'
END
IF @OrderStateID_Min<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderStateID_Min = @tmpOrderStateID_Min'
END
IF @OrderStateID_Max<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderStateID_Max = @tmpOrderStateID_Max'
END
IF @OrderUserID<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderUserID = @tmpOrderUserID'
END
IF @OrderUserID_Min<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderUserID_Min = @tmpOrderUserID_Min'
END
IF @OrderUserID_Max<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderUserID_Max = @tmpOrderUserID_Max'
END
IF @OrderID<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderID = @tmpOrderID'
END
IF @OrderID_Min<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderID_Min = @tmpOrderID_Min'
END
IF @OrderID_Max<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderID_Max = @tmpOrderID_Max'
END
IF @ProductID<>-1
BEGIN
SET @strSQL = @strSQL + ' AND ProductID = @tmpProductID'
END
IF @ProductID_Min<>-1
BEGIN
SET @strSQL = @strSQL + ' AND ProductID_Min = @tmpProductID_Min'
END
IF @ProductID_Max<>-1
BEGIN
SET @strSQL = @strSQL + ' AND ProductID_Max = @tmpProductID_Max'
END
IF @CustomizeID<>-1
BEGIN
SET @strSQL = @strSQL + ' AND CustomizeID = @tmpCustomizeID'
END
IF @CustomizeID_Min<>-1
BEGIN
SET @strSQL = @strSQL + ' AND CustomizeID_Min = @tmpCustomizeID_Min'
END
IF @CustomizeID_Max<>-1
BEGIN
SET @strSQL = @strSQL + ' AND CustomizeID_Max = @tmpCustomizeID_Max'
END
BEGIN TRAN
EXECUTE sp_executesql @strSQL, N'
@tmpOrderStateID INT,
@tmpOrderUserID INT,
@tmpOrderID INT,
@tmpProductID INT,
@tmpCustomizeID INT',
@tmpOrderStateID=@OrderStateID,
@tmpOrderUserID=@OrderUserID,
@tmpOrderID=@OrderID,
@tmpProductID=@ProductID,
@tmpCustomizeID=@CustomizeID
Set @OutID = @OrderID
IF @@error!=0
BEGIN
ROLLBACK
END
ELSE
BEGIN
COMMIT
END
RETURN
三、 Search_Order_Info
/*************************************************************
** Name : Search_Order_Info
** Creater : PPCoder Designed By PPCode Studio(PPTech.Net)
** Create Date : 2004-9-6 8:30:17
** Modifer : Rexsp
** Modify Date : 2004-9-6 8:30:17
** Description : Search information for Order_Info
**************************************************************/
ALTER PROCEDURE dbo.Search_Order_Info
(
@OrderStateID Int = -1,
@OrderStateID_Min Int = -1,
@OrderStateID_Max Int = -1,
@OrderUserID Int = -1,
@OrderUserID_Min Int = -1,
@OrderUserID_Max Int = -1,
@OrderID Int = -1,
@OrderID_Min Int = -1,
@OrderID_Max Int = -1,
@ProductID Int = -1,
@ProductID_Min Int = -1,
@ProductID_Max Int = -1,
@CustomizeID Int = -1,
@CustomizeID_Min Int = -1,
@CustomizeID_Max Int = -1,
@ReturnCount INT=-1,
@OutID INT = 0 OUTPUT
)
AS
DECLARE @strSQL NVARCHAR(1000)
IF @ReturnCount<>-1
BEGIN
SET @strSQL = 'SELECT TOP '+@ReturnCount+' * FROM [Order_Info] WHERE @tmpOrderID = @tmpOrderID '
END
ELSE
BEGIN
SET @strSQL = 'SELECT * FROM [Order_Info] WHERE @tmpOrderID = @tmpOrderID '
END
IF @OrderStateID<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderStateID = @tmpOrderStateID'
END
IF @OrderStateID_Min<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderStateID_Min = @tmpOrderStateID_Min'
END
IF @OrderStateID_Max<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderStateID_Max = @tmpOrderStateID_Max'
END
IF @OrderUserID<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderUserID = @tmpOrderUserID'
END
IF @OrderUserID_Min<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderUserID_Min = @tmpOrderUserID_Min'
END
IF @OrderUserID_Max<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderUserID_Max = @tmpOrderUserID_Max'
END
IF @OrderID<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderID = @tmpOrderID'
END
IF @OrderID_Min<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderID_Min = @tmpOrderID_Min'
END
IF @OrderID_Max<>-1
BEGIN
SET @strSQL = @strSQL + ' AND OrderID_Max = @tmpOrderID_Max'
END
IF @ProductID<>-1
BEGIN
SET @strSQL = @strSQL + ' AND ProductID = @tmpProductID'
END
IF @ProductID_Min<>-1
BEGIN
SET @strSQL = @strSQL + ' AND ProductID_Min = @tmpProductID_Min'
END
IF @ProductID_Max<>-1
BEGIN
SET @strSQL = @strSQL + ' AND ProductID_Max = @tmpProductID_Max'
END
IF @CustomizeID<>-1
BEGIN
SET @strSQL = @strSQL + ' AND CustomizeID = @tmpCustomizeID'
END
IF @CustomizeID_Min<>-1
BEGIN
SET @strSQL = @strSQL + ' AND CustomizeID_Min = @tmpCustomizeID_Min'
END
IF @CustomizeID_Max<>-1
BEGIN
SET @strSQL = @strSQL + ' AND CustomizeID_Max = @tmpCustomizeID_Max'
END
BEGIN TRAN
EXECUTE sp_executesql @strSQL, N'
@tmpOrderStateID INT,
@tmpOrderUserID INT,
@tmpOrderID INT,
@tmpProductID INT,
@tmpCustomizeID INT',
@tmpOrderStateID=@OrderStateID,
@tmpOrderUserID=@OrderUserID,
@tmpOrderID=@OrderID,
@tmpProductID=@ProductID,
@tmpCustomizeID=@CustomizeID
Set @OutID = @OrderID
IF @@error!=0
BEGIN
ROLLBACK
END
ELSE
BEGIN
COMMIT
END
分析：
１、 三個存儲過程的入參基本上相同，只有Search_Order_Info多了一個＠ReturnCount用來控制搜索信息的條數的。入參很有特點：與數據表字段的擴展對應。擴展方式有三種：數字型和日期型擴展出“極小”和“極大”兩個屬性，例如數字型的OrderStateID對應的參數有三個@OrderStateID、@OrderStateID_Min 、@OrderStateID_Max ，時間型的AddTime對應@AddTime、@AddTime_Rof、@AddTime_Eof ；如果是字符型的，則會擴展出一個用來進行模糊搜索的屬性，例如Title對應@Title、@Title_Like。之所以這樣設計，是爲了組合出更具適應性的條件語句。三個存儲過程都有一個出參，就是表的唯一標識ID。這個主要在“添加和更新”操作中使用。當然搜索的時候也可以當唯一鍵返回。這個唯一標識ID也是來判斷是Insert或Update的標識。
２、 入參都有賦初值，然後動態構建Sql語句的時候，會判斷各入參是否等於初值，如果不等於表示是外面傳進來的傳，便參與Sql語句的構建。這種靈活性是程序適應性的保證。這樣，我們就可以在程序員通過控制是否給入參傳值來判斷是否要進行某一欄位進行更新或是否要把某一欄位的信息參與條件語句的構成。
３、 用系統存儲過程sp_executesql來執行Sql語句，完全數據庫操作。用系統存儲過程來執行sql語句有一個好處，就是可以實現特殊字符的自動轉義。
４、 三個存儲過程都有統一的構建規律，所以可以使用自動化工具依據表結構直接生成。
