Beginning in Version 7, you can associate a SAS libref directly with a database, schema, server, or group of tables and views, depending on your DBMS. To assign a libref to DBMS data, you must use the ...

SCHEMA= is optional. If it is omitted ... indicates whether or not the ODBC driver can update multiple rows from the DBMS table when the ODBC driver emulates the UPDATE ... WHERE CURRENT OF CURSOR ...