在MySQL中使用数据透视表对列进行排序

Question

I would like to sort my columns in pivot table. Here is a link to my example table and query what i have now. As you can see in result the name of the columns are unsorted.

I'm basically doing this:

SELECT GROUP_CONCAT(DISTINCT
     CONCAT('MAX(CASE WHEN DATE(date) = ''', date,
            ''' THEN score END) `', DATE_FORMAT(date,'%d.%m.%Y'), '`'))
INTO @sql
FROM tabletest
ORDER BY date;

SET @sql = CONCAT('SELECT name,', @sql, ' 
                 FROM tabletest
                GROUP BY name');

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

My column output is like this:

|    NAME | 30.11.2013 | 28.11.2013 | 27.11.2013 | 29.11.2013 |
|---------|------------|------------|------------|------------|
|   Adele |        234 |        552 |     (null) |     (null) |

And I would like to have the columns sorted.

Thanks in advance.

Answer 1

Just add an ORDER BY date inside the GROUP_CONCAT :

SELECT GROUP_CONCAT(DISTINCT
     CONCAT('MAX(CASE WHEN DATE(date) = ''', date,
            ''' THEN score END) `', DATE_FORMAT(date,'%d.%m.%Y'), '`')
            ORDER BY date)