「MySQL開発」タイムスタンプに従って年月日グループを統計する
1.create_timeタイムフォーマット
SELECT DATE_FORMAT(create_time,’%Y%u’) weeks,COUNT(id) COUNT FROM role GROUP BY weeks;
SELECT DATE_FORMAT(create_time,’%Y%m%d’) days,COUNT(id) COUNT FROM role GROUP BY days;
SELECT DATE_FORMAT(create_time,’%Y%m’) months,COUNT(id) COUNT FROM role GROUP BY months
2.create_timeタイムスタンプフォーマット
SELECT FROM_UNIXTIME(create_time,’%Y%u’) weeks,COUNT(id) COUNT FROM role GROUP BY weeks;
SELECT FROM_UNIXTIME(create_time,’%Y%m%d’) days,COUNT(id) COUNT FROM role GROUP BY days;
SELECT FROM_UNIXTIME(create_time,’%Y%m’) months,COUNT(id) COUNT FROM role GROUP BY months