ORA-01100: database already mounted
Answers were Sorted based on User's Feedback
Answer / harbai computer education
ORA-01100: database already mounted
First off, what Oracle calls a "database" is generally different than what most other database products call a "database". A "database" in MySQL or SQL Server is much closer to what Oracle calls a "schema" which is the set of objects owned by a particular user. In Oracle, you would generally only have one database per server (a large server might have a handful of databases on it) where each database has many different schemas. If you are using the express edition of Oracle, you are only allowed to have 1 database per server. If you are connected to Oracle via SQL Developer, that indicates that you already have the Oracle database created.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / guest
Cause: A database is already mounted in this instance.
Action: none
Please add more information about this Error
Is This Answer Correct ? | 13 Yes | 16 No |
i think "database already mounted" means that
oracle instance is associated with your current database (
which ever you have database name (name may be "xe") )
so your new database in not creating because that instance
is engaged with your older database ,
ACTION - edit the pfile ( it is the file to create new
instance parameter) so that new instance will be created
now you can write the create database statement
Is This Answer Correct ? | 19 Yes | 29 No |
ORA-32322: PCT refresh of "string"."string" not allowed the sequence of DMLs/PMOPs
ORA-00345: redo log write error block string count string
PLS-01402: Use of quoted identifier
ORA-00327: log string of thread string, physical size string less than needed string
ORA-00019: maximum number of session licenses exceeded
RMAN-03039: Spooling for log turned off
PLS-01464: VARIANCE is not a standard set function
ORA-31041: Property string: Memory type (string) not compatible with database type (string)
NNL-00911: Responses sent with invalid error code: number
ORA-00208: number of controlfile names exceeds limit of string
DRG-11718: multiple Preferred Terms for term string
QSM-02117: missing GROUPING_ID or GROUPING functions on GROUP BY column(s)