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-12569: TNS:packet checksum failure
ORA-02269: key column cannot be of LONG datatype
ORA-26501: RepAPI operation failure
ORA-25187: specified exceptions table form incorrect
LPX-00227: entity "~S" is not a parsed entity
CLSS-03001: local node number string, master node number string
RMAN-12014: multiple records for default channel configuration for string found in catalog
ORA-26051: internal error parsing packed decimal format string
ORA-07216: slghst: gethostname error, unable to get name of current host.
ORA-31102: Already locked in exclusive mode. Cannot add lock.
ORA-38449: table "string" does not exist or is not accessible
ORA-19580: %s conversation not active