Which specific CASE expression yields East when us_states equals Florida?

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Multiple Choice

Which specific CASE expression yields East when us_states equals Florida?

Explanation:
A CASE expression with a WHEN condition maps a specific test to a result. In the form CASE WHEN us_states = 'Florida' THEN 'East' END, the expression checks whether the state is Florida. If true, it returns the value after THEN, which is 'East'. Since there is no ELSE, if the condition isn’t met the result would be NULL. Because us_states equals Florida in this scenario, the expression yields East. The other options either test a different state (which would not equal Florida and, without an ELSE, would produce NULL), use invalid syntax (the CASE keyword must be followed by WHEN), or include an ELSE that provides a default for non-matching cases (though that still returns East for Florida due to the matching WHEN). The simplest direct mapping of Florida to East is achieved with the first form.

A CASE expression with a WHEN condition maps a specific test to a result. In the form CASE WHEN us_states = 'Florida' THEN 'East' END, the expression checks whether the state is Florida. If true, it returns the value after THEN, which is 'East'. Since there is no ELSE, if the condition isn’t met the result would be NULL. Because us_states equals Florida in this scenario, the expression yields East.

The other options either test a different state (which would not equal Florida and, without an ELSE, would produce NULL), use invalid syntax (the CASE keyword must be followed by WHEN), or include an ELSE that provides a default for non-matching cases (though that still returns East for Florida due to the matching WHEN). The simplest direct mapping of Florida to East is achieved with the first form.

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