存储过程：

存储过程（Stored Procedure）是在大型数据库系统中，一组为了完成特定功能的SQL 语句集，经编译后存储在数据库中，用户通过指定存储过程的名字并给出参数（如果该存储过程带有参数）来执行它。存储过程是数据库中的一个重要对象，任何一个设计良好的数据库应用程序都应该用到存储过程。

存储过程的建立：

选中存储过程，右击——新建存储过程，则出现下面的代码。

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:		<Author,,Name>
-- Create date: <Create Date,,>
-- Description:	<Description,,>
-- =============================================
CREATE PROCEDURE <Procedure_Name, sysname, ProcedureName> 
	-- Add the parameters for the stored procedure here
	<@Param1, sysname, @p1> <Datatype_For_Param1, , int> = <Default_Value_For_Param1, , 0>, 
	<@Param2, sysname, @p2> <Datatype_For_Param2, , int> = <Default_Value_For_Param2, , 0>
AS
BEGIN
	-- SET NOCOUNT ON added to prevent extra result sets from
	-- interfering with SELECT statements.
	SET NOCOUNT ON;

    -- Insert statements for procedure here
	SELECT <@Param1, sysname, @p1>, <@Param2, sysname, @p2>
END
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:		<Author,,Name>
-- Create date: <Create Date,,>
-- Description:	<Description,,>
-- =============================================
ALTER PROCEDURE [dbo].[PROC_SettleAccount]
	-- Add the parameters for the stored procedure here
	@Recharge numeric(18,2) ,@ReturnM numeric(18,2),
	@Income numeric(18,2),@UserName char(10),
	@SetDate char(10),@SetTime char(10)
AS
BEGIN
	-- SET NOCOUNT ON added to prevent extra result sets from
	-- interfering with SELECT statements.
	SET NOCOUNT ON;

    -- Insert statements for procedure here
	insert into Bill (Recharge ,ReturnM ,Income ,UserName ,SetDate ,SetTime )
	values (@Recharge ,@ReturnM ,@Income ,@UserName ,@SetDate ,@SetTime )
	update RechargeRecords set SettleAccountState ='已结账' where UserName =@UserName and SettleAccountState ='未结账'
	update ReturnMoneyRecords  set SettleAccountState ='已结账' where UserName =@UserName and SettleAccountState ='未结账'
	update Cards  set SettleAccountState ='已结账' where UserName =@UserName and SettleAccountState ='未结账'
	
END

  Public Function SettleAccount(bill As Entity.Bill) As Boolean Implements IDAL.IBill.SettleAccount
        Dim cmdtext As String
        cmdtext = "PROC_SettleAccount" '用存储过程的名称来替换SQL语句
        bill.SetDate = Format(Now, "yyyy-MM-dd") '获得当前日期
        bill.SetTime = Format(Now, "HH:mm:ss") '获得当前时间
        '添加参数
        Dim sqlparameter As SqlParameter() = {New SqlParameter("@Recharge", bill.Recharge),
                                             New SqlParameter("@ReturnM", bill.ReturnM),
                                             New SqlParameter("@Income", bill.Income),
                                             New SqlParameter("@UserName", bill.UserName),
                                             New SqlParameter("@SetDate", bill.SetDate),
                                             New SqlParameter("@SetTime", bill.SetTime)}
        Dim helper As New SqlHelper
        Dim flag As Boolean
        '中间的参数变为存储过程特用的参数
        flag = helper.ExecAddDelUpdate(cmdtext, CommandType.StoredProcedure, sqlparameter)
        Return flag
    End Function

存储过程的优点：

总结：使用存储过程，在一定程度上减少了代码量，又尝试使用不曾用过得东西，会有成就感。