No. It may happen that the items you place together in a table are the same as the items you include in a catalog section, but tables are not the same as catalog sections. Tables are designed to help you manage your items more efficiently. Just because two items are contained in the same Catalog Manager table doesn't meant that they will display in the same section of your published catalog.

When you create a table, you choose the fields that are available to you when you add items to that table. If you sell a large number of new and used books, for example, you might want to create a special "Books" table. You could include fields especially relevant to books, like an "ISBN" field or a "Reading Level" field that would allow you to indicate the book's target audience. If you also sold records and tapes, you could then create a separate table including fields more relevant to those items such as genre (rock, jazz, classical) or rating (general, teen, mature).