Question : Do you know how I could make a single SQL Statement into a compound SQL Statement using the following SQL statements ?

I am developing an Access 2003 application using Access as the front end and SQL Server as the back in database.

In my VBA Code, I use the following SQL Statement to update a table titled tblPSInfo.

Do you know how I could make this single SQL Statement assigned to the variable
SQL1 into a compound SQL Statement using the following additional SQL Statement:      BRANCH = Mid(CostCenter), 4, 3

sSQL1 = "UPDATE tblPSInfo SET EMAILADD = '" & Replace(getEmailAll, "'", "''") & "' WHERE EMPNUM = '" & id & "'"            

Add the following SQL Statement:

BRANCH = Mid(CostCenter), 4, 3        

Answer : Do you know how I could make a single SQL Statement into a compound SQL Statement using the following SQL statements ?

sSQL1 = "UPDATE tblPSInfo SET EMAILADD = '" & Replace(getEmailAll, "'", "''") & "', BRANCH = Mid([CostCenter], 4, 3)  WHERE EMPNUM = '" & id & "'"  


where is [CostCenter] coming from?