表被指定两次，既作为“ UPDATE”的目标，又作为mysql中数据的单独来源

这是典型的MySQL问题，通常可以通过从派生表中进行选择来规避，例如

FROM manager AS m2

采用

FROM (select * from manager) AS m2

完整的声明：

UPDATe managerSET status = 'Y'WHERe branch_id IN(  select branch_id  FROM (select * from manager) AS m2  WHERe (branch_id, year) IN  (    SELECt branch_id, year    FROM branch_master    WHERe type = 'finance'  ));