Select into another table update from another table

insert into table from select.

SELECT *
INTO new_table_name [IN externaldatabase]
FROM old_tablename

Update from one table into another

UPDATE
    Sales_Import
SET
    AccountNumber = RAN.AccountNumber
FROM
    Sales_Import SI
INNER JOIN
    RetrieveAccountNumber RAN
ON
    SI.LeadID = RAN.LeadID

more...