Update table field by summing field from another table [duplicate]

问题

This question already has answers here:

Access - query update with Inner Join (2 answers)

Closed 25 days ago.

I am trying to update a table filed taking value from another table by summing a field based on EmpID.

In tblEmpInfo EmpID is primary key. I have saw few post on this site but couldn't adopt to my file. Here is my code till yet.

UPDATE tblEmpInfo AS c 
INNER JOIN (SELECT EmpID, SUM(ProfidentFund) AS total FROM tblTransactions GROUP BY EmpID)  AS x ON c.EmpID = x.EmpID 
SET c.ProfidentFund = x.total;

Above code give me following warning and do not update value to tblEmpInfo

tblEmpInfo screenshot.

tblTransactions screenshot.

And my expected output.

回答1:

You can try the below -

UPDATE  c 
SET c.ProfidentFund = x.total
from tblEmpInfo AS c
INNER JOIN 
(SELECT EmpID, SUM(ProfidentFund) AS total FROM tblTransactions GROUP BY EmpID)  AS x 
    ON c.EmpID = x.EmpID 

来源：https://stackoverflow.com/questions/62929358/update-table-field-by-summing-field-from-another-table