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Using the JOIN Operator
Wagner Crivelini
IBM GBS Brazil
Brazil
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© 2011 IBM Corporation
Relational Model – a Database Diagram
A simplified library’s database model
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© 2011 IBM Corporation
Joining Tables – always 2 at a time
Borrower.Borrower_ID = Loan.Borrower_ID
TIP: when writing the SQL statement, use aliases for both tables
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© 2011 IBM Corporation
Types of Joins
• INNER JOIN
• LEFT OUTER JOIN (or LEFT JOIN for short)
• RIGHT OUTER JOIN (or RIGHT JOIN for short)
• FULL OUTER JOIN (or FULL JOIN for short)
• CROSS JOIN
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© 2011 IBM Corporation
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