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To delete all rows older than 30 days, you need to use the DELETE with INTERVAL. Use < now() i.e. less than operator to get all the records before the current date.
Answer: C. TRUNCATE is a DDL command. It removes the records from the table without any condition. It is not the part of any ongoing transaction and an uncommitted transaction in the session is committed after TRUNCATE is executed.
DELETE FROM on_search
WHERE search_date < UNIX_TIMESTAMP(DATE_SUB(NOW(), INTERVAL 180 DAY))
DELETE FROM on_search WHERE search_date < NOW() - INTERVAL N DAY
Replace N with your day count
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