There are two types of tables that a web developer can include on there web pages they are layout tables and data tables.
A blind and partially sighted user can face many accessibility problems with layout tables however there are ways to overcome these problems. Meanwhile data tables present fewer problems to blind and visually impaired users. There are several methods that a web developer can use to make a data table accessible to a blind and visually impaired user.
This page contains links to pages that contain additional information about the issues involved in making both types of tables accessible to blind and visually impaired users.