select into requires column level permissions, including decrypt, on the source table.
Encrypt columns on the new table using this syntax:
select [all|distinct] column_list into target_table [(colname encrypt [with [database.[owner].]keyname] [,colname encrypt [with [database.[owner].]keyname]])] from tabname | viewname
You cannot reference a column in the partition_clause that
is specified for encryption in the target table.
Encrypting creditcard column in the bigspenders table.
select creditcard, custid, sum(amount) into #bigspenders (creditcard encrypt with cust.database.new_cc_key) from daily_xacts group by creditcard having sum(amount) > $5000