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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 · The Union operator combines the results of two or more queries into a single result set that includes all the rows that belong to all queries in the Union. In simple terms, it combines the two or more row sets and keeps duplicates. For example, the table ‘A’ has 1,2, and 3 and the table ‘B’ has 3,4,5.
19 sie 2012 · SELECT Customers.FirstName, Customers.Surname, Customers.DOB, Customers.CustomerAddress. FROM Customers. WHERE Customers.CustomerAddress LIKE '%'+ 'Gladys'+ '%'. In a union, the two or more queries should always have the same number of fields in the SELECT statement.
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.
24 lip 2024 · The UNION operator in SQL is used to combine the result set of multiple SELECT statements and return one result set. There are some rules for using the SQL UNION operator. Rules for SQL UNION. Each table used within UNION must have the same number of columns. The columns must have the same data types.
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 .
