Example 1: Deleting a catalog The following statement deletes the catalog DEPT1 associated with the alias PERSONNEL_ALIAS: SQL> ATTACH 'ALIAS PERSONNEL_ALIAS FILENAME CORPORATE_DATA'; SQL> SET QUOTING RULES 'SQL99'; SQL> CREATE CATALOG "PERSONNEL_ALIAS.DEPT1"; SQL> SHOW CATALOG; Catalogs in database PERSONNEL_ALIAS "PERSONNEL_ALIAS.ADMINISTRATION" "PERSONNEL_ALIAS.RDB$CATALOG"" "PERSONNEL_ALIAS.DEPT1" SQL> DROP CATALOG "PERSONNEL_ALIAS.DEPT1"; SQL> SHOW CATALOG; Catalogs in database PERSONNEL_ALIAS "PERSONNEL_ALIAS.ADMINISTRATION" "PERSONNEL_ALIAS.RDB$CATALOG" SQL> DROP CATALOG "PERSONNEL_ALIAS.RDB$CATALOG"; %SQL-F-NODROPSYSCAT, Catalog "PERSONNEL_ALIAS.RDB$CATALOG" may not be dropped SQL>