我正在研究考勤系统，我有表tableattendance字段
EMP_ID，
DATE_TIME_IN，
DATE_TIME_OUT，
ATTANDANCE_STATUS，
当员工准时打电话时，对于后来者来说，它会被视为“P”和“Y”。现在我有一个查询来获取完整的月份出勤记录。
SELECT EMP_ID,
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-01' THEN ATTENDANCE_STATUS END) '2014-12-01',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-02' THEN ATTENDANCE_STATUS END) '2014-12-02',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-03' THEN ATTENDANCE_STATUS END) '2014-12-03',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-04' THEN ATTENDANCE_STATUS END) '2014-12-04',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-05' THEN ATTENDANCE_STATUS END) '2014-12-05',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-06' THEN ATTENDANCE_STATUS END) '2014-12-06',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-07' THEN ATTENDANCE_STATUS END) '2014-12-07',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-08' THEN ATTENDANCE_STATUS END) '2014-12-08',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-09' THEN ATTENDANCE_STATUS END) '2014-12-09',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-10' THEN ATTENDANCE_STATUS END) '2014-12-10',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-11' THEN ATTENDANCE_STATUS END) '2014-12-11',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-12' THEN ATTENDANCE_STATUS END) '2014-12-12',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-13' THEN ATTENDANCE_STATUS END) '2014-12-13',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-14' THEN ATTENDANCE_STATUS END) '2014-12-14',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-15' THEN ATTENDANCE_STATUS END) '2014-12-15',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-16' THEN ATTENDANCE_STATUS END) '2014-12-16',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-17' THEN ATTENDANCE_STATUS END) '2014-12-17',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-18' THEN ATTENDANCE_STATUS END) '2014-12-18',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-19' THEN ATTENDANCE_STATUS END) '2014-12-19',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-20' THEN ATTENDANCE_STATUS END) '2014-12-20',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-21' THEN ATTENDANCE_STATUS END) '2014-12-21',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-22' THEN ATTENDANCE_STATUS END) '2014-12-22',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-23' THEN ATTENDANCE_STATUS END) '2014-12-23',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-24' THEN ATTENDANCE_STATUS END) '2014-12-24',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-25' THEN ATTENDANCE_STATUS END) '2014-12-25',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-26' THEN ATTENDANCE_STATUS END) '2014-12-26',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-27' THEN ATTENDANCE_STATUS END) '2014-12-27',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-28' THEN ATTENDANCE_STATUS END) '2014-12-28',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-29' THEN ATTENDANCE_STATUS END) '2014-12-29',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-30' THEN ATTENDANCE_STATUS END) '2014-12-30',
MAX(CASE WHEN DATE_FORMAT(DATE_TIME_IN, '%Y-%m-%d') = '2014-12-31' THEN ATTENDANCE_STATUS END) '2014-12-31'
FROM `tblattendance`
GROUP BY EMP_ID;
此查询非常正常，可生成以下结果。
EMP_ID 2014-12-01 2014-12-02 2014-12-03 2014-12-04 2014-12-05 2014-12-06 2014-12-07 2014-12-08 2014-12-09 2014-12-10 2014-12-11 2014-12-12 2014-12-13 2014-12-14 2014-12-15 2014-12-16 2014-12-17 2014-12-18 2014-12-19 2014-12-20 2014-12-21 2014-12-22 2014-12-23 2014-12-24 2014-12-25 2014-12-26 2014-12-27 2014-12-28 2014-12-29 2014-12-30 2014-12-31
1 P P P Y P P P P P Y P P P P P P P P P P Y P P P P P Y P P P P
2 P P P Y P P P P P Y P P P P P P P P P P Y P P P P P Y P P P P
3 P P P Y P P P P P Y P P P P P P P P P P Y P P P P P Y P P P P
4 P P P Y P P P P P Y P P P P P P P P P P Y P P P P P Y P P P P
5 P P P Y P P P P P Y P P P P P P P P P P Y P P P P P Y P P P P
6 P P P Y P P P P P Y P P P P P P P P P P Y P P P P P Y P P P P
7 P P P Y P P P P P Y P P P P P P P P P P Y P P P P P Y P P P P
8 P P P Y P P P P P Y P P P P P P P P P P Y P P P P P Y P P P P
9 P P P Y P P P P P Y P P P P P P P P Y P Y P P Y P P Y P P Y P
10 P P P Y P P P P P Y P P P P P P P P Y P Y P P Y P P Y P P Y P
现在，我的目标是计算礼品总数，并在结果结束时为每位员工延迟。请帮助任何人。