INSERT INTO EmployeeUK VALUES(6, 'Rajesh', 'Pradhan', 'Male','HR') INSERT INTO EmployeeUK VALUES(5, 'Anurag', 'Mohanty', 'Male','IT') INSERT INTO EmployeeUK VALUES(4, 'Subrat', 'Sahoo', 'Male','HR') INSERT INTO EmployeeUK VALUES(3, 'Preety', 'Tiwary', 'Female','HR') INSERT INTO EmployeeUK VALUES(2, 'Priyanka', 'Dewangan', 'Female','IT') INSERT INTO EmployeeUK VALUES(1, 'Pranaya', 'Rout', 'Male','IT') Please use the below SQL Script to create the database EmployeeDB and the tables EmployeeUK and EmployeeUSA with the required data. We are going to use the following EmployeeUK and EmployeeUSA tables to understand the SET Operators in MySQL. Examples to understand SET Operators in MySQL: The column names or aliases must be found out by the first select statement. In order to sort the result, an ORDER BY clause should be part of the last select statement.The columns in the SELECT statement must be in the same order and have similar data types.Every SELECT statement involved in the query must have a similar number of columns.Points to Remember while working with Set Operations: EXCEPT: It is used to combine two result sets and returns the data from the first result set which is not present in the second result set.INTERSECT: It is used to combine two result sets and returns the data which are common in both the result set.UNION ALL: It is used to combine two or more result sets into a single set, including duplicates.UNION: It is used to combine two or more result sets into a single set, without duplicates.The SET Operators in MySQL are basically used to combine the result of more than 1 select statement and return the output as a single result set. Please read our previous article where we discussed Concatenation and Temporal Operators in MySQL with examples. In this article, I am going to discuss SET Operators ( UNION, UNION ALL, INTERSECT, & EXCEPT) in MySQL with Examples. Data Structures and Algorithms Tutorialsīack to: MySQL Tutorials for Beginners and Professionals SET Operators in MySQL (UNION, UNION ALL, INTERSECT, & EXCEPT).WHERE IS NOT NULL Īnd of course, you must apply the same method to this part, too. Plus, you'll need to end each query with, like this: SELECT AS ordine, AS data, comm AS commessa So you have to wrap the right part of the UNION with (). I found a simple solution: myODBC will only understand queries with ONE UNION (or UNION ALL). It's a MyODBC bug see offical entry here. SELECT AS ordine, AS data, numero AS commessa SELECT AS ordine, AS data, comm AS commessa WHERE `numero ordine cliente` IS NOT NULLĮdit, if you are using MS Access then you will need to use the square brackets: SELECT * SELECT `numero ordine cliente` AS ordine, `data ordine cliente` AS data, numero AS commessa So I think your query should be: SELECT `Ordine numero` AS ordine, `data ordine` AS data, comm AS commessa The identifier quote character is the backtick (“`”): So if you need to enclose table/column name use backticks `. As far as I know, square brackets are not valid for MySQL and are only valid for Microsoft products (SQL Server/MS Access). You have tagged your question as MySQL and you are using square brackets.
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