SELECT CURRENT_TIMESTAMP;
SELECT TO_CHAR(CURRENT_TIMESTAMP, 'YYYY-MM-DD HH24:MI:SS');
SELECT EXTRACT(EPOCH FROM TIMESTAMP '2022-01-01 00:00:00');
SELECT TIMESTAMP 'epoch' + 1640995200 * INTERVAL '1 second';
SELECT EXTRACT(EPOCH FROM CURRENT_DATE);
SELECT EXTRACT(EPOCH FROM TIMESTAMP '2022-01-01');
