Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

If you join two tables that both have missing rows, you can combine the effect of a left and a right join by using a full join. The following figure shows the results of this query.

In most implementations of SQL, you pull information from two tables by using a SELECT command in this form: SELECT table1.column1, table1.column2, table2.column1, table2.column2 FROM table1, table2 ...