題解 | #實習(xí)廣場投遞簡歷分析(二)#
實習(xí)廣場投遞簡歷分析(二)
http://www.fangfengwang8.cn/practice/d323a4c97d1945e0aabe94e4d0bbb25d
#第一步:篩選條件(2025年),并轉(zhuǎn)換日期格式

#第二步:窗口函數(shù):統(tǒng)計以月份為單位的投簡歷數(shù)量

SELECT id, job, DATE_FORMAT(DATE,"%Y-%m") "mon", num FROM resume_info WHERE YEAR(DATE)= 2025
#第二步:窗口函數(shù):統(tǒng)計以月份為單位的投簡歷數(shù)量
SELECT DISTINCT job, mon, SUM(num) over(PARTITION BY job, mon) "cnt" FROM (SELECT id, job, DATE_FORMAT(DATE,"%Y-%m") "mon", num FROM resume_info WHERE YEAR(DATE)= 2025) t ORDER BY mon DESC, cnt DESC