如何在mysql或php中显示动态数据行到数据列？

Question

I have the same problem with (MySQL or PHP Transform rows to columns)[Mysql MySQL or PHP Transform rows to two columns dynamically. But with different header column format.

My database table

i have done with this question, below is my query version:

SELECT GROUP_CONCAT(
      'MAX(IF(day(tanggal) = ',
      day(tanggal),
      ', presensi, NULL)) AS `',
      tanggal,
      '`, '
    order by tanggal
  ) INTO @sql
  FROM tableName;

when running a query it show notification "Query executed OK, 1 row affected.", but result is empty, this is The table expected what looks like

Answer 1

create your static query:

select id_pegawai, 
max(if(tanggal="2019-06-13", presensi, null)) as "2019-06-13",
max(if(tanggal="2019-06-14", presensi, null)) as "2019-06-14"
from yourtable
group by id_pegawai;

create a dinamic query:

  SET @sql = NULL;
    SELECT
     GROUP_CONCAT(
      DISTINCT
        CONCAT(
            'max(if(tanggal="', 
            tanggal, 
            '", presensi, null)) as "',
            tanggal,
            '"'
        )
     ) into @sql
    FROM yourtable;
    SET @sql = CONCAT('SELECT id_pegawai, ',
                        @sql, ' FROM yourtable GROUP BY id_pegawai');

Execute your dinamic query:

    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;

inspired from this post: http://buysql.com/mysql/14-how-to-automate-pivot-tables.html