MySQL獲取當月每一天

查了很多，但是都有問題，這個算是完美解決。當月每一天都能顯示完全，不多不少。

MySQL獲取當月每一天數據，此條sql是計算當月的，獲取其他月份的可以全文替換curdate()爲(例：'2017-03-01')
SELECT date FROM
(select
DATE_ADD(t1.dayed,INTERVAL t2.number DAY) date from
(select DATE_ADD(curdate(),interval -day(curdate())+1 day) dayed) t1,
(SELECT @xi:=@xi+1 as number from 
(SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4) xc1, 
(SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8) xc2,
(SELECT @xi:=-1) xc0 ) t2
where DATE_ADD(t1.dayed ,INTERVAL t2.number DAY))time WHERE SUBSTRING(date,1,7)=SUBSTRING(CURDATE(),1,7)