MySQL病例陳述雙重結果

Question

美好的一天！ 我正在與我的項目一起工作，需要指出小時是否存在，請假，假期。如果員工在場，我會統計時間。如果需要休假和假期，總工資時間是他們的工作時間表。

Select `leave`.emp_id, 
        leave_request.date, 
        CASE WHEN leave.status_id = 4 AND leave_request.with_pay = 1 THEN 
        ( 
         SELECT TIMESTAMPDIFF(HOUR, w_s.time_in, w_s.time_out) 
         FROM working_schedule w_s 
         JOIN employee_working_schedule ews ON w_s.id = ews.working_schedule_id 
         WHERE ews.employee_id = '01-0001' 
        ) 
        WHEN leave.status_id = 4 AND leave_request.with_pay = 0 THEN '0' 
        END AS status    
        FROM `leave` 
        JOIN leave_request On `leave`.id = leave_request.`leave_id` 
        JOIN employee_logs AS e_l ON leave.emp_id = e_l.employee_id 
        WHERE `leave`.emp_id = '01-0001'  
        UNION 
        SELECT e.employee_code AS id, 
        CAST(e_l.time_in As date) day, 
        CASE WHEN e_l.time_in IS NOT NULL THEN TIMESTAMPDIFF(HOUR, e_l.time_in, e_l.time_out) 

        FROM employee e 
        LEFT JOIN employee_logs e_l ON e.employee_code = e_l.employee_id 
        LEFT JOIN employee_company e_c ON e.employee_code = e_c.employee_id 
        LEFT JOIN company c ON e_c.company_id = c.id 
        JOIN employee_working_schedule ews On e.employee_code = ews.employee_id 
        JOIN working_schedule w_s On ews.working_schedule_id = w_s.id 
        WHERE e.employee_code = '01-0001' 
        AND e_l.time_in BETWEEN '2017-09-01' AND '2017-09-28' 
        UNION 
        SELECT '01-0001', 
        CASE WHEN holiday.date BETWEEN '2017-09-01' AND '2017-09-28' THEN 
        (SELECT holiday.date) END AS date, 
        CASE WHEN holiday.date BETWEEN '2017-09-01' AND '2017-09-28' THEN 
        ( 
         SELECT TIMESTAMPDIFF(HOUR, w_s.time_in, w_s.time_out) 
         FROM working_schedule w_s 
         JOIN employee_working_schedule ews ON w_s.id = ews.working_schedule_id 
         WHERE ews.employee_id = '01-0001' 
        ) 
        END AS status 
        FROM holiday  

所以是有可能在這裏添加其他結果。例如（CASE WHEN e_l.time_in IS NOT NULL THEN TIMESTAMPDIFF（HOUR，e_l.time_in，e_l.time_out）END AS hours_count）THEN Present END AS狀態

Answer 1

如果我理解正確的話，你要添加其他列爲您的狀態選擇語句。 也許你需要做的就是這樣。

SELECT `leave`.emp_id, 
     leave_request.date, 
     CASE 
      WHEN leave.status_id = 4 AND leave_request.with_pay = 1 THEN (
        SELECT TIMESTAMPDIFF(HOUR, w_s.time_in, w_s.time_out) 
        FROM working_schedule w_s 
          JOIN employee_working_schedule ews 
           ON w_s.id = ews.working_schedule_id 
        WHERE ews.employee_id = '01-0001' 
       ) 
      WHEN leave.status_id = 4 AND leave_request.with_pay = 0 THEN '0' 
     END AS hours_count, 
     CASE 
      WHEN leave.status_id = 4 AND leave_request.with_pay = 1 THEN 'Paid' 
      WHEN leave.status_id = 4 AND leave_request.with_pay = 0 THEN 'Unpaid' 
     END + ' Leave' AS Status 
FROM `leave` 
     JOIN leave_request 
      ON `leave`.id = leave_request.`leave_id` 
     JOIN employee_logs AS e_l 
      ON leave.emp_id = e_l.employee_id 
WHERE `leave`.emp_id = '01-0001' 
UNION 

SELECT e.employee_code   AS id, 
     CAST(e_l.time_in AS DATE) AS Date, 
     CASE 
      WHEN e_l.time_in IS NOT NULL THEN TIMESTAMPDIFF(HOUR, e_l.time_in, e_l.time_out) 
     END AS hours_count, 
     'Present' AS Status 
FROM employee e 
     LEFT JOIN employee_logs e_l 
      ON e.employee_code = e_l.employee_id 
     LEFT JOIN employee_company e_c 
      ON e.employee_code = e_c.employee_id 
     LEFT JOIN company c 
      ON e_c.company_id = c.id 
     JOIN employee_working_schedule ews 
      ON e.employee_code = ews.employee_id 
     JOIN working_schedule w_s 
      ON ews.working_schedule_id = w_s.id 
WHERE e.employee_code = '01-0001' 
     AND e_l.time_in BETWEEN  '2017-09-01' AND '2017-09-28' 
UNION 

SELECT '01-0001', 
     CASE 
      WHEN holiday.date BETWEEN '2017-09-01' AND '2017-09-28' THEN (
        SELECT holiday.date 
       ) 
     END AS DATE, 
     CASE 
      WHEN holiday.date BETWEEN '2017-09-01' AND '2017-09-28' THEN (
        SELECT TIMESTAMPDIFF(HOUR, w_s.time_in, w_s.time_out) 
        FROM working_schedule w_s 
          JOIN employee_working_schedule ews 
           ON w_s.id = ews.working_schedule_id 
        WHERE ews.employee_id = '01-0001' 
       ) 
     END AS hours_count, 
     'Holiday' AS Status 
FROM holiday  

只需在hours_count列旁添加另一列即可。 希望得到這個幫助。