To illustrate how a LEFT JOIN works, let’s simply change INNER JOIN to LEFT JOIN in our original SELECT statement, like this: SELECT Donors.DonorID,Donors.Donorname. DonationRecords.DonationAmt ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...