How to implement the multiple control files for an existing database ?

How to implement the multiple control files for an
existing database ?
by

1 Answer

Answer :

Shutdown the database Copy one of the existing control file to new
location Edit Config ora file by adding new control file. name Restart
the database.
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Related questions

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Description : You have just had to restore from backup and do not have any control files. How would you go about bringing up this database?

Last Answer : I would create a text based backup control file, stipulating where on disk all the data files where and then issue the recover command with the using backup control file clause.

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Description : What are database files, control files and log files. How many of these files should a database have at least? Why?

Last Answer : ∙ Database Files The database files hold the actual data and are typically the largest in size. Depending on their sizes, the tables (and other objects) for all the user accounts can go in one ... or redo log file to the database, the information is recorded in the control files. ∙ Redo Logs

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Description : How will you swap objects into a different table space for an existing database ?

Last Answer : Export the user Perform import using the command imp system/manager file=export.dmp indexfile=newrite.sql. This will create all definitions into newfile.sql. Drop necessary objects. Run the script newfile.sql after altering the tablespaces. Import from the backup for the necessary objects.

Name two files used for network connection to a database.

Description : Name two files used for network connection to a database.

Last Answer : TNSNAMES.ORA and SQLNET.ORA

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Last Answer : There are three major sets of files on disk that compose a database. All the files are binary. These are ∙ Database files ∙ Control files ∙ Redo logs The most important of these ... actual data resides. The control files and the redo logs support the functioning of the architecture itself.

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Description : How will you create multiple rollback segments in a database ?

Last Answer : Create a database which implicitly creates a SYSTEM Rollback Segment in a SYSTEM tablespace. Create a Second Rollback Segment name R0 in the SYSTEM tablespace. Make new rollback segment ... ) for rollback segments. Deactivate Rollback Segment R0 and activate the newly created rollback segments.

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Description : Can one export to multiple files?/ Can one beat the Unix 2 Gig limit? (for DBA

Last Answer : From Oracle8i, the export utility supports multiple output files. This feature enables large exports to be divided into files whose sizes will not exceed any operating system limits (FILESIZE= parameter). When ... > scott.exp.gz & # feed the pipe exp userid=scott/tiger file=exp.pipe ...

Is it possible to use Transaction control Statements such a ROLLBACK or COMMIT in Database Trigger ? Why ?

Description : Is it possible to use Transaction control Statements such a ROLLBACK or COMMIT in Database Trigger ? Why ?

Last Answer : It is not possible. As triggers are defined for each table, if you use COMMIT of ROLLBACK in a trigger, it affects logical transaction processing.

How do you control number of Datafiles one can have in an Oracle database?

Description : How do you control number of Datafiles one can have in an Oracle database?

Last Answer : The db_files parameter is a "soft limit " parameter that controls the maximum number of physical OS files that can map to an Oracle instance. The maxdatafiles parameter is a different - "hard limit" ... value is 32. The maximum number of database files can be set with the init parameter db_files.

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Description : How do u implement the If statement in the Select Statement

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Description : What are roles? How can we implement roles ?

Last Answer : Roles are the easiest way to grant and manage common privileges needed by different groups of database users. Creating roles and assigning provides to roles. Assign each role to group of users. This will simplify the job of assigning privileges to individual users.

Table Space,Data Files,Parameter File, Control Files

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Description : How can a break order be created on a column in an existing group? What are the various sub events a mouse double click event involves?

Last Answer : By dragging the column outside the group.

In mapping of ERD to DFD a) entities in ERD should correspond to an existing entity/store in DFD b) entity in DFD is converted to attributes of an entity in ERD c) relations in ERD has 1 to 1 correspondence to processes in DFD d) relationships in ERD has 1 to 1 correspondence to flows in DFD

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Last Answer : a) entities in ERD should correspond to an existing entity/store in DFD

How does one manage Oracle database users? (for DBA

Description : How does one manage Oracle database users? (for DBA

Last Answer : Oracle user accounts can be locked, unlocked, forced to choose new passwords, etc. For example, all accounts except SYS and SYSTEM will be locked after creating an Oracle9iDB database using the DB ... locked users account ALTER USER scott PASSWORD EXPIRE; -- Force user to choose a new password

How does one manage Oracle database users? (for DBA

Description : How does one manage Oracle database users? (for DBA

Last Answer : Oracle user accounts can be locked, unlocked, forced to choose new passwords, etc. For example, all accounts except SYS and SYSTEM will be locked after creating an Oracle9iDB database using the ... from SYS.V$BH log buffer spaces Increase LOG_BUFFER parameter or move log files to faster disks

How does one backup a database using the export utility? (for DBA

Description : How does one backup a database using the export utility? (for DBA

Last Answer : Oracle exports are "logical" database backups (not physical) as they extract data and logical definitions from the database into a file. Other backup strategies normally back-up the physical data ... exports include more information about the database in the export file than user level exports.

What strategies are available for backing-up an Oracle database? (for DBA

Description : What strategies are available for backing-up an Oracle database? (for DBA

Last Answer : The following methods are valid for backing-up an Oracle database: Export/Import - Exports are "logical" database backups in that they extract logical definitions and data from the database to a file. ... , etc. If your database is in ARCGIVELOG mode, you also need to backup archived log files.

Why and when should I backup my database? (for DBA

Description : Why and when should I backup my database? (for DBA

Last Answer : Backup and recovery is one of the most important aspects of a DBAs job. If you lose your company's data, you could very well lose your job. Hardware and software can always be ... things that will get you. Most failed recoveries are a result of organizational errors and miscommunications.

What are the roles and user accounts created automatically with the database?

Description : What are the roles and user accounts created automatically with the database?

Last Answer : DBA - role Contains all database system privileges. SYS user account - The DBA role will be assigned to this account. All of the base tables and views for the database's dictionary ... administrative information and internal tables and views used by oracle tools are created using this username.

What are the responsibilities of a Database Administrator ?

Description : What are the responsibilities of a Database Administrator ?

Last Answer : Installing and upgrading the Oracle Server and application tools. Allocating system storage and planning future storage requirements for the database system. Managing primary database structures ... tape Backing up and restoring the database. Contacting Oracle Corporation for technical support.

How does one create a standby database? (for DBA)

Description : How does one create a standby database? (for DBA)

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When creating a user, what permissions must you grant to allow them to connect to the database?

Description : When creating a user, what permissions must you grant to allow them to connect to the database?

Last Answer : Grant the CONNECT to the user.

Name a tablespace automatically created when you create a database.

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Description : How would you determine the time zone under which a database was operating?

Last Answer : select DBTIMEZONE from dual;

Where would you look for errors from the database engine?

Description : Where would you look for errors from the database engine?

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Description : What is public database link?

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Description : What is private database link?

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Description : What are the types of database links?

Last Answer : Private database link, public database link & network database link.

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Description : What is Database Link ?

Last Answer : A database link is a named object that describes a "path" from one database to another.

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Description : What are the steps involved in Database Shutdown ?

Last Answer : Close the Database, Dismount the Database and Shutdown the Instance.

What are the advantages of operating a database in ARCHIVELOG mode over operating it in NO ARCHIVELOG mode ?

Description : What are the advantages of operating a database in ARCHIVELOG mode over operating it in NO ARCHIVELOG mode ?

Last Answer : Complete database recovery from disk failure is possible only in ARCHIVELOG mode. Online database backup is possible only in ARCHIVELOG mode.

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Description : Can Full Backup be performed when the database is open ?

Last Answer : No.

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Description : What are the steps involved in Database Startup ?

Last Answer : Start an instance, Mount the Database and Open the Database. Rolling forward to recover data that has not been recorded in data files, yet has been recorded in the on-line redo ... Resolving any pending distributed transactions undergoing a two- phase commit at the time of the instance failure.

Can you store pictures in database? How?

Description : Can you store pictures in database? How?

Last Answer : Yes , in long Raw datatype.

Can U disable database trigger? How?

Description : Can U disable database trigger? How?

Last Answer : Yes. With respect to table ALTER TABLE TABLE [[ DISABLE all_trigger ]]

Who created all these users in my database?/ Can I drop this user? (for DBA

Description : Who created all these users in my database?/ Can I drop this user? (for DBA

Last Answer : Oracle creates a number of default database users or schemas when a new database is created. Below are a few of them: SYS/CHANGE_ON_INSTALL or INTERNAL Oracle Data Dictionary/ Catalog Created ... there should be no problem altering these users to use a different default and temporary tablespace.

How does one create and drop database users?

Description : How does one create and drop database users?

Last Answer : Look at these examples: CREATE USER scott IDENTIFIED BY tiger -- Assign password DEFAULT TABLESACE tools -- Assign space for table and index segments TEMPORARY TABLESPACE temp; -- Assign sort space ... give the user some space quota on its tablespaces: ALTER USER scott QUOTA UNLIMITED ON tools;

What are Database Triggers and Stored Procedures

Description : What are Database Triggers and Stored Procedures

Last Answer : Database Triggers :: Database Triggers are Procedures that are automatically executed as a result of insert in, update to, or delete from table. Database triggers have the values old and new to ... procedures is that many users can use the same procedure in compiled and ready to use format.

What is a database link ?

Description : What is a database link ?

Last Answer : Database Link is a named path through which a remote database can be accessed.

Difference between database triggers and form triggers?

Description : Difference between database triggers and form triggers?

Last Answer : Data base trigger(DBT) fires when a DML operation is performed on a data base table. Form trigger(FT) Fires when user presses a key or navigates between fields on the screen -Can be row ... other database triggers to fire.Can cause other database triggers to fire, but not other form triggers.

Can you use a commit statement within a database trigger?

Description : Can you use a commit statement within a database trigger?

Last Answer : No

What are different Oracle database objects?

Description : What are different Oracle database objects?

Last Answer : TABLES -VIEWS INDEXES -SYNONYMS -SEQUENCES -TABLESPACES etc

What is Database Trigger ?

Description : What is Database Trigger ?

Last Answer : A Database Trigger is procedure (set of SQL and PL/SQL statements) that is automatically executed as a result of an insert in,update to, or delete from a table.

What are the uses of Database Trigger ?

Description : What are the uses of Database Trigger ?

Last Answer : Database triggers can be used to automatic data generation, audit data modifications, enforce complex Integrity constraints, and customize complex security authorizations.

What are the different types of PL/SQL program units that can be defined and stored in ORACLE database ?

Description : What are the different types of PL/SQL program units that can be defined and stored in ORACLE database ?

Last Answer : Procedures and Functions,Packages and Database Triggers.

What is a database trigger ? Name some usages of database trigger ?

Description : What is a database trigger ? Name some usages of database trigger ?

Last Answer : Database trigger is stored PL/SQL program unit associated with a specific database table. Usages are Audit data modifications, Log events transparently, Enforce complex business rules Derive column values automatically, Implement complex security authorizations. Maintain replicate tables.

How many types of database triggers can be specified on a table ? What are they ?

Description : How many types of database triggers can be specified on a table ? What are they ?

Last Answer : Insert Update Delete Before Row o.k. o.k. o.k. After Row o.k. o.k. o.k. Before Statement o.k. o.k. o.k. After Statement o.k. o.k. o.k. If FOR EACH ROW clause is ... for each Row affected by the statement. If WHEN clause is specified, the trigger fires according to the returned Boolean value.