Update statement with left outer join in from clause. - response (3) by Harpreet Singh

Hi,
Below is one conversion, I am looking for generic template to be applied across SQL server code and that is the reason that update statement is not broken into multiple statements for left join. Please let me know if I am missing some future data issues with this code.

UPDATE a
FROM TAC_CDD_TodayCDD_CountryRisk a,
(SELECT b.BRANCH_RISK_FACTOR,a.ABC_Risk_wo_Override, a.REVIEW_ID,a.ABC_Country, a.Client_GID 
FROM TAC_CDD_TodayCDD_CountryRisk a
LEFT JOIN TAC_CDD_ABC_Uplift b ON b.REVIEW_ID = a.REVIEW_ID
 AND b.COUNTRY_NAME = a.ABC_Country) M
 
SET ABC_Risk = 
CASE WHEN M.BRANCH_RISK_FACTOR = 'Undefined' THEN a.ABC_Risk_wo_Override
 WHEN M.BRANCH_RISK_FACTOR = 'Accepted' THEN a.ABC_Risk_wo_Override
 WHEN M.BRANCH_RISK_FACTOR IS NULL THEN a.ABC_Risk_wo_Override
 ELSE COALESCE(M.BRANCH_RISK_FACTOR, a.ABC_Risk_wo_Override)
 END
 WHERE
COALESCE(m.Client_GID,'')  = COALESCE(a.Client_GID ,'')
AND  COALESCE(m.ABC_Country,'')  = COALESCE(a.ABC_Country,'')
   AND m.REVIEW_ID = a.REVIEW_ID 

Thanks
Harpreet