理论能力2

公式：(机器实际上班时间 - 停机时间) / 机器标准时间 * 标准夹具数

CREATE FUNCTION [dbo].[udf_TheoreticalDutyTwo]
(
    @MachineId SMALLINT,
    @OperatorDate DATETIME 
)
RETURNS decimal(18,6) 
AS
 BEGIN
    DECLARE @ReturnValue DECIMAL(18,6)
    
    --取得机器实际上班时间
    DECLARE @WorkTime DECIMAL(18,6)
    SELECT @WorkTime  = (SELECT SUM([WorkTime]) FROM [dbo].[udf_WorkTicketData_1]() WHERE [MachineId] = @MachineId AND [OperatorDate] = @OperatorDate) 
    
    --取得机器停机时间
    DECLARE @MachineHaltTime DECIMAL(18,6)
    SELECT @MachineHaltTime = (SELECT SUM([MachineHaltTime]) FROM [dbo].[udf_WorkTicketData_1]() WHERE [MachineId] = @MachineId AND [OperatorDate] = @OperatorDate) 
    
    --计算机器运作时间
    DECLARE @RealWorkTime DECIMAL(18,6)
    SELECT @RealWorkTime = (ISNULL(@WorkTime,0) * 3600 - ISNULL(@MachineHaltTime,0) * 60)
    
    --从机器参数表，取得机器的标准时间和机器的标准夹具数
    DECLARE @StandTime DECIMAL(18,6)
    DECLARE @StandJigNumber TINYINT
    SELECT @StandTime = [StandardTime],@StandJigNumber = [JigNumber] FROM [MachineParameter] WHERE [MachineId] = @MachineId AND (YEAR([MonthName])= YEAR(@OperatorDate)) AND (MONTH([MonthName]) = MONTH(@OperatorDate))
    
    --计算机器的理论能力2
    SELECT @ReturnValue=(CASE WHEN @StandTime = 0 THEN NULL  WHEN @StandTime IS NULL THEN NULL  WHEN @StandTime <> 0 THEN ((ISNULL(@RealWorkTime,0) / @StandTime) * ISNULL(@StandJigNumber,0)) END)
    RETURN @ReturnValue
 END