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CREATE TABLE S ( `summa` INT, `start_date` DATE ); INSERT INTO S VALUES (10, NOW()), (20, DATE_SUB(NOW(), INTERVAL 1 MONTH)), (30, DATE_SUB(NOW(), INTERVAL 1 MONTH)); SET @MONTH = DATE_FORMAT(DATE_ADD(NOW(), INTERVAL -1 MONTH), '%Y-%m'); SELECT SUM(`summa`) as full_summa, SUM( IF(DATE_FORMAT(`start_date`, '%Y-%m') = @MONTH, `summa`, 0) ) `month_summa`, AVG( IF( DATE_FORMAT(`start_date`, '%Y-%m') = @MONTH, `summa`, null) ) `month_average` FROM S;
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