Mysql根據出生日期查詢年齡,並分組

根據生日查詢出生日期:

SELECT(YEAR (curdate())- YEAR ( birthday )- 1+ (DATE_FORMAT( birthday, '%m%d' )<=(DATE_FORMAT( curdate(), '%m%d' )))) age FROM t_member

 

分組

SELECT (CASE
WHEN a.age IS NULL THEN ‘未知’
WHEN a.age BETWEEN 0 AND 18 THEN ‘0-18歲’
WHEN a.age BETWEEN 18 AND 30 THEN ‘18-30歲’
WHEN a.age BETWEEN 31 AND 45 THEN ‘30-45歲’
WHEN a.age >= 45 THEN ‘45歲以上’
END) AS name,
COUNT(*) ‘value’ FROM
(SELECT(YEAR (curdate())- YEAR ( birthday )- 1+ (DATE_FORMAT( birthday, ‘%m%d’ )<=(DATE_FORMAT( curdate(), ‘%m%d’ )))) age FROM t_member) a GROUP BY name

 

查詢結果: