Question

Can anyone help me on creation of comparison matrix from mySQL table.
I have following table.

MRP | Brand | USAGE
10 | ABC | 200 MB
10 | XYZ | 300 MB
20 | ABC | 500 MB
30 | XYZ | 600 MB

I want a query which gives following result.

MRP | ABC | XYZ
10 | 200 MB | 300 MB
20 | 500 MB |-----------
30 | -----------| 600 MB

can I achieve this using PHP?
thanks and regards.

Answer 1

You want what’s called a pivot table.

something like:

SELECT MRP,
    MAX(IF(Brand='ABC', USAGE,0)) as 'ABC',
    MAX(IF(Brand='XYZ', USAGE,0)) as 'XYZ'
FROM table
GROUP BY MRP;

See this article for more info:
http://www.artfulsoftware.com/infotree/queries.php#78