Reforming table structure of columns possible? - mysql

Question

I have bee at this all day. I have played around with a lot of MySQL code and I am either inept, or not very good at coding..
I have a table
name id type amount
=================================
apple 21 cars 67
apple 21 bikes 85
apple 21 skates 557
apple 21 pajs 56
orange 34 bikes 345
orange 34 disks 678
orange 34 cars 234
orange 34 pajs 5678
I want to write a query that will bring back the table in this form
name id cars bikes skates pajas disks
=========================================
apple 21 67 85 557 56 0
orange 34 234 345 0 5678 678
I really just have no clue where to start. Sorry if this is noobie question but MySQL is really hard to conceptualize sometimes.

Answer 1

Try using PreparedStatement
SET #sql = NULL;
SELECT
GROUP_CONCAT(DISTINCT
CONCAT(
'MAX(ID),MAX(case when type = ''',
type,
''' then amount ELSE NULL end) AS ',
type
)
) INTO #sql
FROM table1;
SET #sql = CONCAT('SELECT name, ', #sql, '
FROM table1 GROUP BY name');
PREPARE stmt FROM #sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
SQLFiddle Demo
Alternatively,
SELECT name,
MAX(ID) ID,
MAX(case when type = 'cars' THEN amount ELSE NULL end) AS cars,
MAX(case when type = 'bikes' THEN amount ELSE NULL end) AS bikes,
MAX(case when type = 'skates' THEN amount ELSE NULL end) AS skates,
MAX(case when type = 'pajas' THEN amount ELSE NULL end) AS pajas,
MAX(case when type = 'disks' THEN amount ELSE NULL end) AS disks
FROM table1
GROUP BY name;
SQLFiddle Demo