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select current_date, datediff (year from date '2023-01-01' to current_date), dateadd (datediff (year from date '2023-01-01' to current_date) year to date '2023-01-01') from rdb$database; select current_date, datediff (day from date '2023-01-01' to current_date), dateadd (datediff (day from date '2023-01-01' to current_date) day to date '2023-01-01') from rdb$database;

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