mysql用一个表更新另一个表

写法：

UPDATE Document,
ObservationRequest
SET Document.CreateOrganizationName = ObservationRequest.OrganizationName
WHERE
Document.BusinessID = ObservationRequest.ObservationUID;

验证：

SELECT
o.ServiceSectID,
d.Modality
FROM
ObservationRequest o
INNER JOIN Document d ON o.ObservationUID = d.BusinessID
WHERE o.ObservationUID <> d.BusinessID;