How to join two rows in same table?

[sooeydoo]

Could someone please help me formulate a query for the following function:

I have two rows - heading and body - in one table tiki_articles

While all rows have heading, only some have body. I want to combine those rows that have a body with their corresponding heading rows so that the result is one big heading row with both heading and body content in that order.

The ID is defined by another row called articleId, if it is needed.

Thanks so much for any help!