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UNION ALL Syntax. The UNION operator selects only distinct values by default. To allow duplicate values, use UNION ALL: SELECT column_name (s) FROM table1. UNION ALL. SELECT column_name (s) FROM table2; Note: The column names in the result-set are usually equal to the column names in the first SELECT statement.
Introduction to Oracle UNION operator. The UNION operator is a set operator that combines result sets of two or more SELECT statements into a single result set. The following illustrates the syntax of the UNION operator that combines the result sets of two queries: SELECT. column_list_1.
The UNION operator returns only distinct rows that appear in either result, while the UNION ALL operator returns all rows. The UNION ALL operator does not eliminate duplicate selected rows:
Get your own SQL server SQL Statement: SELECT City, Country FROM Customers WHERE Country='Germany' UNION SELECT City, Country FROM Suppliers WHERE Country='Germany' ORDER BY City;
19 Αυγ 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.
The set operators union, intersect, and minus allow you to combine many tables into one. This tutorial will use these two tables for the queries: select * from my_brick_collection; select * from your_brick_collection;
Here's the basic syntax: SELECT column1, column2, ... FROM table1 UNION SELECT column1, column2, ... FROM table2; Remember, for UNION to work properly: The number of columns in each SELECT statement must be the same. The data types of corresponding columns should be compatible. The column order in each SELECT statement should be the same.
