SQL/SQL Set Operators.sql at main · hiitarun1/SQL · GitHub

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-- SQL SET OPERATORS
-- USE salesdb;
-- SELECT * FROM salesdb.customers;
-- SELECT * FROM salesdb.employees;
-- SELECT customerId AS ID,
-- lastname
-- FROM salesdb.customers
-- UNION
-- SELECT
-- employeeid,
-- lastname AS last_name
-- FROM salesdb.employees;


-- SELECT
-- firstname,
-- lastname
-- FROM salesdb.customers
-- UNION
-- SELECT
-- firstname,
-- lastname
-- FROM salesdb.employees


-- SELECT
-- firstname,
-- lastname
-- FROM salesdb.customers
-- UNION ALL
-- SELECT
-- firstname,
-- lastname
-- FROM salesdb.employees


-- SELECT
-- firstname,
-- lastname
-- FROM salesdb.employees
-- EXCEPT
-- SELECT
-- firstname,
-- lastname
-- FROM salesdb.customers


-- SELECT
-- firstname,
-- lastname
-- FROM salesdb.customers
-- INTERSECT
-- SELECT
-- firstname,
-- lastname
-- FROM salesdb.employees