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题解 | #实习广场投递简历分析(三)#

SELECT resume_info.job,SUBSTRING(date,1,7),sum(distinct resume_info.num),second,sum(distinct b.num2) FROM resume_info,( select r1.job,SUBSTRING(da...

2021-08-09

0 279

题解 | #考试分数(三)#

select grade.id,name,score from grade left join `language` on `language`.id = grade.language_id WHERE score >= ( select max(g1.score) from ...

2021-08-09

0 285

题解 | #异常的邮件概率#

SELECT date,round(( select COUNT(*) FROM email e1,user sen,user rec WHERE e1.send_id = sen.id and sen.is_blacklist = 0 and e1.receive_id =...

2021-08-07

0 297