Is it possible to create a table using markup, or even html for that matter?
It's possible to do it in html, but that's not really what we're discussing, is it? Since SOL only accepts a minimal amount of SOL commands, and converts them into it's own markup language, you're essentially asking whether SOL supports tables, and the answer is no.
As DS suggests, you can insert images, but again, SOL isn't really equipped to handle images due to the site's bandwidth limitations, and Lazeez's lack of funds to build up his bandwidth connections. Thus images should be used sparingly. If you only have a single table, that's one thing, though I believe the image has to be at the beginning of the chapter, rather than floating at a fixed point in the text. That essentially defeats your purpose.
Your best bet is to go old school and assume fixed letter widths and count out the distances to create your own tables using ASCII unicode characters. Of course, SOL doesn't use a uniform width for characters, but it'll still preserve the information in a readable format.