Sigil is great, but does not do complex code yet. You need to do a quick HTML doc that is your table. You can use NoteTab Light html editor (free). There are many html tutorials on the web. Google search. The easy way is search for "html table generator" use the one at
http://www.code-generator.net/html/h...enerator.cfm -. After you get the table done, import it into your Sigil epub as an existing item where you need it. You can leave it as a separate section or merge it where you want it.