SQL Reference
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Quick Reference

The UNION ALL keywords combines the result set of two or more SELECT statements (will return duplicate values).

The following returns the cities (including duplicate values) from both the Customers table and the Suppliers table.

SELECT city FROM Customers
UNION ALL
SELECT city FROM Suppliers
ORDER BY city ASC;

SQL Notes:

  • Any work being done to modify the structure of a database or delete tables or the the database itself should only be done after making a recent backup
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