It is important to make sure you use an open parenthesis before the beginning table, and a closing parenthesis after the end of the last column definition. Make sure you seperate each column definition with a comma. The table and column names must start with a letter and can be followed by letters, numbers, or underscores - not to exceed a total of 30 characters in length.
Data types specify what the type of data can be for that particular column.
Size is specified in parenthesis. Max 255 bytes. Max size is specified in parenthesis. When tables are created, it is common for one or more columns to have constraints associated with them. A constraint is basically a rule associated with a column that the data entered into that column must follow.