爲女票寫的計算工做時間的SQL

排除非工做時間、非工做往後，計算工做時間，代碼以下：

-- 刪除函數
DROP FUNCTION IF EXISTS calculateWorkingTime;

set @workStartTime='09:30:00'; 
set @workEndTime='18:30:00'; 

-- 建立函數
--/
CREATE FUNCTION calculateWorkingTime(startDate datetime,endDate datetime)
RETURNS decimal(32,4)
BEGIN
  DECLARE intnum int(255) DEFAULT 0;
  DECLARE decimalnum decimal(32,4) DEFAULT 0.000;
  DECLARE workStartTimeHour decimal(32,4) DEFAULT 0.000;
  DECLARE workEndTimeHour decimal(32,4) DEFAULT 0.000;
  DECLARE currentDay int(10) DEFAULT 0;
  DECLARE tempTimeHour decimal(32,4) DEFAULT 0.000;
  -- DECLARE temp varchar(2048) DEFAULT '';
  
  -- deal starttime and endtime is nonworkdays
  SET startDate = (CASE WHEN weekday(startDate)=5 THEN concat(date(timestampadd(day,2,startDate)),' ',@workStartTime) WHEN weekday(startDate)=6 THEN concat(date(timestampadd(day,1,startDate)),' ',@workStartTime) ELSE startDate END);
  SET endDate = (CASE WHEN weekday(endDate)=5 THEN concat(date(timestampadd(day,-1,endDate)),' ',@workEndTime) WHEN weekday(endDate)=6 THEN concat(date(timestampadd(day,-2,endDate)),' ',@workEndTime) ELSE endDate END);
--  SET temp = concat(temp,' ',startDate,';',endDate);
   if startDate < endDate then
    -- deal starttime and endtime is nonworktime
    if time(startDate)<=@workStartTime THEN
       SET startDate = concat(date(startDate),' ', @workStartTime);
    elseif date(startDate) < date(endDate) and time(startDate)>@workEndTime then 
       SET startDate = concat(date(date_add(startDate, interval 1 day)),' ',@workStartTime);
    end if;
    
    if time(endDate)>=@workEndTime then
      SET endDate = concat(date(endDate),' ',@workEndTime);
    elseif date(startDate) < date(endDate) and time(endDate)<@workStartTime then 
       SET endDate = concat(date(date_add(endDate, interval -1 day)),' ',@workEndTime);
    end if;
    
    -- calculate time diff
    SET decimalnum = (minute(endDate)*60+second(endDate)-minute(startDate)*60-second(startDate))/3600;
    
  end if;
  
  -- calculate work time second
  SET workStartTimeHour = hour(@workStartTime)+minute(@workStartTime)/60+second(@workStartTime)/3600;
  SET workEndTimeHour = hour(@workEndTime)+minute(@workEndTime)/60+second(@workEndTime)/3600; 
  
 --  WHILE (floor((unix_timestamp(endDate) - unix_timestamp(startDate))/3600) > 0) DO
 WHILE ((floor(unix_timestamp(endDate)/3600) - floor(unix_timestamp(startDate)/3600)) > 0) DO
     SET tempTimeHour = hour(startDate)+minute(startDate)/60+second(startDate)/3600;
     
     if   workStartTimeHour <= tempTimeHour and tempTimeHour < workEndTimeHour then
    --   SET temp = concat(temp,' ',tempTimeHour,';');
       SET intnum = (CASE WHEN weekday(startDate)=5 or weekday(startDate)=6 then intnum ELSE intnum+1 END);
     end if;
     SET startDate = timestampadd(hour,1,startDate);
   END WHILE;
  
   SET decimalnum = intnum + decimalnum;
  -- concat(decimalnum,';',workStartTimeHour,' ',workEndTimeHour,' ',intnum,';;;',temp);
  RETURN decimalnum;
END 
/



-- select calculateWorkingTime('2017-02-17 07:30:00','2017-02-21 17:39:00');
select transport_id,create_at1,create_at2,create_at3, calculateWorkingTime(create_at1,create_at2), calculateWorkingTime(create_at2,create_at3),calculateWorkingTime(create_at1,create_at3) from newTable;

select transport_id,calculateWorkingTime(create_at1,create_at2) from newTable;

    說明：第一次實現這種需求，當初寫的時候又比較趕，寫完後，發現，雖然功能實現了，但還有好多地方能夠調優 

            女票是搞數據運營的，常常須要統計員工的工做時間；聽女票說，這段SQL代碼統計時好像有些問題，但還沒來的急分析緣由呢；女票又有新需求來了，不只須要將非工做時間、非工做日去掉，還須要將節假日去掉   我將上面代碼重構，實現想要功能（重構後的代碼就不放出了）

 

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