MySQL query statement grouped by time

SELECT DATE_FORMAT(t.bill_time,'%Y') month_time,sum(t.pay_price) total FROM f_bill t GROUP BY month_time;

SELECT DATE_FORMAT(t.bill_time,'%Y-%m') month_time,sum(t.pay_price) total FROM f_bill t GROUP BY month_time;

SELECT CONCAT(SUBSTR(DATE_FORMAT(t.bill_time,'%Y-%u') FROM 1 FOR 4),'第',SUBSTR(DATE_FORMAT(t.bill_time,'%Y-%u'),6),'周') week_time,sum(t.price) total FROM f_bill t GROUP BY week_time;

SELECT DATE_FORMAT(t.bill_time,'%Y-%m-%d') month_time,sum(t.pay_price) total FROM f_bill t GROUP BY month_time;