sql - Update field with data from another database -

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need update field data field in different database

i have 2 sql commercial databases same company, first database has 1 field null in other

i need update field/database null data of first one.

ms sql server

update table1 in current database table1 in database called "databasename"

update table1 set col2 = t2.col2 databasename.dbo.table1 t2   table1.id = t2.id ,         table1.col2 null

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