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D. EXPIRY_DATE cannot be used in arithmetic expressions.
False. You can use Arithmetic expressions in Dates, just not all of them.
SELECT
DATE'2023-05-20' - 1 AS expire_date,
DATE'2023-05-20' + 1 AS extra_day
FROM DUAL;
I agree that the primary key could contain duplicated values, but is the one that seems most feasible out of the remaining options.
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