Question

OK, I have a single table with keys and values that I need to query and order from that looks somewhat like this:

Let’s say I want to pull all distinct items (resource_no) that are in the webcategory of “dog” (and any other values) and order them by “order” in ascending order so that my result is this:

I can’t figure out how to query my table to allow this…I have tried inner joins but they do not seem to work…can anyone help? Thanks!

Answer 1

Kind of tricky to read when it’s all in separate rows n the same table, but this should do it for the values you have now. If you’re thinking dynamic columns, you’ll need to go database specific procedures.

SELECT a.RESOURCE_NO, a.value webcategory, b.value location 
FROM      resources a
LEFT JOIN resources b ON a.RESOURCE_NO=b.RESOURCE_NO AND b.key='location'
LEFT JOIN resources c ON a.RESOURCE_NO=c.RESOURCE_NO AND c.key='order'
WHERE a.key = 'webcategory' AND a.value='dog'
GROUP BY RESOURCE_NO
ORDER BY c.value 

Demo here.