Concatenating cities and states

In the previous exercise, you used the + operator to combine two columns into one. This time you need to do the same, but using the CONCAT() function.

To get this format for the concatenation: 'Las Vegas, Nevada', you will need to use the CASE expression in case the state column has NULL values.

Deze oefening maakt deel uit van de cursus

Cleaning Data in SQL Server Databases

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Oefeninstructies

Concatenate the names of the cities with the states using the CONCAT() function, while using a CASE statement that returns '' when state is NULL and performs a normal concatenation otherwise.

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

SELECT 
		client_name,
		client_surname,
    -- Use the function to concatenate the city and the state
		___(
				___,
				CASE WHEN state IS NULL THEN '' 
				ELSE ___(', ', ___) END) AS city_state
FROM clients

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