标签：方法 pre where sign cas image mys style load
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,cast(p.SBP as signed)-cast(p.SBP2 as signed)
FROM
ppg_data AS p
where p.SBP2 is not null
and p.SBP is not null
标签：方法 pre where sign cas image mys style load
原文地址：https://www.cnblogs.com/zhanghongpan/p/13275337.html
