摘要:
MYSQL中没有row_number()over(partition by order by ),如何排序后进行筛选? 方法一: select OperatorID,sum(cnt) as '总人数',sum(case when Quality=1 then cnt else 0 end ) as 阅读全文
摘要:
SELECT p.PatientID ,p.SBP, p.SBP2,p.SBP-p.SBP2 FROM ppg_data AS p where p.SBP2 is not null and p.SBP is not null 更改为 SELECT p.PatientID ,p.SBP, p.SBP2 阅读全文