Cause
keyword AT or VALUES missing
keyword AT or VALUES missing
Ensure that a definition of a MATERIALIZED VIEW does not include invalid options
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
https://community.oracle.com/message/3481081
https://community.oracle.com/message/3229900
Browse all solutions to database errors from Oracle, MS SQL, or MySQL