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SQL UNION Example. The following SQL statement returns the cities (only distinct values) from both the "Customers" and the "Suppliers" table: Example Get your own SQL Server. SELECT City FROM Customers. UNION. SELECT City FROM Suppliers. ORDER BY City; Try it Yourself »
The UNION operator in SQL selects fields from two or more tables. In this tutorial, you will learn about the SQL UNION operator with the help of examples.
25 wrz 2018 · This article provides overview of the SQL UNION operator, along with examples and explore some common questions like the differences between UNION vs UNION ALL.
This tutorial shows you how to use SQL UNION to combine two or more result sets from multiple queries & explains the difference between UNION and UNION ALL.
This tutorial shows you how to use the Oracle UNION to combine result sets of multiple queries. The UNION removes duplicate while the UNION ALL does not.
UNION is an operator which combines the resultset of two or more SELECT queries into a single resultset. It is a set operation and is different from joining two tables with JOIN. The UNION operator combines the rows of the participating tables while JOIN combines the columns of the participating tables on a condition.
SQL Server UNION examples. See the following staffs and customers tables from the sample database: UNION and UNION ALL examples. The following example combines names of staff and customers into a single list: SELECT . first_name, last_name. FROM . sales.staffs. UNION SELECT . first_name, last_name. FROM .
