How to insert 0 in the array returned by PDO query

Question

I have this PDO query which return me the count of test-cases failed on a particular platform

$status = 'failed';
$allTest = $conn->prepare('SELECT COUNT(testRunID),platform FROM tooldata WHERE status = :status GROUP BY platform ORDER BY platform' );
$allTest->execute(array(':status' => $status));

how i can modify this query, So that I can insert 0 for all those platform on which no test-case is failed.

I can check when the returned row is null with -

foreach($conn->prepare('SELECT COUNT(testRunID),platform FROM tooldata WHERE status = :status GROUP BY platform ORDER BY platform') as $row):
    if($row['totalCOunt'] != 0):
        echo "WE HAVE Failed testcase";
    else:
        echo "WE DO NOT HAVE failed testcase";
    endif;
endforeach;

but how to insert 0 for such rows in the output array ?

Please help.

Answer 1

Just remove the WHERE clause.
Try this...

SELECT COUNT(testRunID),platform FROM tooldata GROUP BY platform ORDER BY platform'

This query will show all the plateforms with respective count.

Answer 2

As far as I can tell from your description, you may be need something like this

SELECT count(1), sum(if(status = 'failed'),1,0) platform 
FROM tooldata GROUP BY platform ORDER BY platform'

if it doesn't work for you - then don't complain, as I am not supposed to write a complete working code for you for free, but give you an idea, how to solve your problem. So - try to understand the idea, instead of just mindlessly copy/paste. And give some feedback.

Answer 3

Use mysql UNION in your query to select other results :

SELECT 0, platform from tooldata where status != :status GROUP BY platform
    union select COUNT(testRunID),platform FROM tooldata WHERE status = :status GROUP BY platform ORDER BY platform

as such :

$status = 'failed';
$allTest = $conn->prepare('SELECT 0, platform from tooldata where status != :status GROUP BY platform
        union select COUNT(testRunID),platform FROM tooldata WHERE status = :status GROUP BY platform ' );
$allTest->execute(array(':status' => $status));