Group and make row become header - mysql

Question

I have this data in my MySQL table fact
+------------+-------+--------+
| timestamp | code | unique |
+------------+-------+--------+
| 1416157200 | 7E001 | 100 |
| 1416157200 | 7E002 | 200 |
| 1416243600 | 7E001 | 100 |
| 1416243600 | 7E002 | 200 |
+------------+-------+--------+
I want to get this result
+-------+------------+------------+
| code | 2014-11-18 | 2014-11-17 |
+-------+------------+------------+
| 7E001 | 100 | 100 |
| 7E002 | 200 | 200 |
+-------+------------+------------+
I use this query select code, from_unixtime(timestamp, '%Y-%m-%d') as date, unique from fact; to produce this result and have no idea to aggregate this result became above desirable result.
+-------+------------+--------+
| code | date | unique |
+-------+------------+--------+
| 7E001 | 2014-11-17 | 100 |
| 7E002 | 2014-11-17 | 200 |
| 7E001 | 2014-11-18 | 100 |
| 7E002 | 2014-11-18 | 200 |
+-------+------------+--------+
Is it possible? And how to achieve that?
PS: Please help me editing the title to be more descriptive since I can't explain this problem in such short

Answer 1

Case based aggregation can be used
As the dates can be many, you need to use dynamic SQL
select code,
Max( case when date=1416157200 then unique end) as '2014-11-17' ,
Max( case when date=1416243600 t hen unique end) as '2014-11-18'
from fact
Group by date

Answer 2

Yes it is possible creating a dynamic query using that values as columns.
I use some code from article describing a way to get a pivot table in MySQL:
mysql> call get_fact_pivot_table();
+-------+------------+------------+
| code | 2014-11-16 | 2014-11-17 |
+-------+------------+------------+
| 7E001 | 100 | 100 |
| 7E002 | 200 | 200 |
+-------+------------+------------+
2 rows in set (0,06 sec)
The procedure get_fact_pivot_table contains a cursor to make a dynamic query, you can change it as you need:
DELIMITER $$
DROP PROCEDURE if exists get_fact_pivot_table$$
CREATE PROCEDURE `get_fact_pivot_table`()
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE p_sql text;
DECLARE p_col_date VARCHAR(20);
DECLARE p_col_value int;
DECLARE c_columns cursor FOR
select distinct from_unixtime(timestamp, '%Y-%m-%d') as `col_date` ,
`timestamp` as col_value
from fact;
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;
SET p_sql = 'select f.code ';
OPEN c_columns;
read_loop: LOOP
FETCH c_columns INTO p_col_date, p_col_value;
IF done THEN
LEAVE read_loop;
END IF;
SET p_sql = concat(p_sql,
', (select c.`unique` from fact as c where
c.`timestamp` = ', p_col_value ,'
and c.code = f.code limit 1) as `',p_col_date,'` ');
END LOOP;
SET #SQL = concat(p_sql,' from fact as f group by f.code');
close c_columns;
PREPARE stmt1 FROM #SQL;
EXECUTE stmt1;
DEALLOCATE PREPARE stmt1;
END$$
delimiter ;