Can there be multiple primary key in a table?
Each table can only have one primary key. Access can automatically create a primary key field for you when you create a table, or you can specify the fields that you want to use as the primary key.
Can multiple rows be added in a table?
Tip: To insert more than one row (or column) at the same time, select as many rows or columns as you want to add before you click the insert control. For example, to insert two rows above a row, first select two rows in your table and then click Insert Above.