sql查詢當前月每天的數據統計量

SELECT
    count(a.id) AS '數量',
    DAY (a.create_date) AS '時間'
FROM
    test aWHERE
    MONTH (a.create_date) = MONTH (NOW()) 
GROUP BY
    DAY (a.create_date)

主要使用的DAY函數和MONTH函數，GOOUP BY 分組查詢 如果查詢上個月每天的數據統計量

MONTH (NOW()) -1即可

 

或者使用以下sql

SELECT
    count(a.id),
    SUBSTR(a.create_date,1,10)
FROM
    test a
WHERE
    1=1
AND a.create_date LIKE '%2019-11%'
GROUP BY SUBSTR(a.create_date,1,10)