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.

The phrase FROM Donors INNER JOIN DonationRecords ON tells SQL to find matching records between the two tables, based on the expression that follows the key word ON.

To do so, you will need to join two tables, including one that stores jobs and one that stores schedules, using SQL.