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Given these contents of the Customers table:
How many rows will have the result of the next query
SELECT Name FROM Customers WHERE ReferredBy<>2?
There are 2 tables: Offices and Cities. They are linked by City_id. At the moment these tables have the following data
Which of the next queries will return 3 rows?
What will be the results of the next two queries:
SELECT 'I like '+ NULL + 'SQL.'
SELECT CONCAT('I like ', NULL, 'SQL.')?