Need some SQL syntax help :-)
Both databases are on the same server
db1 = DHE db2 = DHE_Import UPDATE DHE.dbo.tblAccounts INNER JOIN DHE_Import.dbo
Worked perfectly for me.
UPDATE TABLE_A a INNER JOIN TABLE_B b ON a.col1 = b.col2 SET a.col_which_you_want_update = b.col_from_which_you_update;