Tag: oracle certification

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Appreciate a DBA’s role

Who is a DBA?

A Database Administrator (DBA) is a technical person who is responsible for the environmental aspects of a database. In general, these include the following database aspects:

  • Recoverability
  • Integrity
  • Security
  • Availibilty
  • Performance
  • Development and testing support

In other words, a DBA is a person who is responsible for designing, developing and implementing programs, as required, to support the technical capabilities in a database environment.

Pass the following certifications using uCertify PrepKits:

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OCP 1Z0-043 Short Notes: Exam passing tips

Configuring Recovery Manager

  • The control file, target database catalog, and Recovery catalog is used to store the RMAN’s persistent settings.
  • The alert log file is used to find out the values of the changed parameters at the time of instance startup.
  • The NLS_LANG parameter must be set to specify the language, territory, and character set used in an application.
  • CONFIGURE RETENTION POLICY CLEAR is a command that will configure the retention policy to the default of REDUNDANCY 1.
  • CONFIGURE is an RMAN command that configures an RMAN environment.
  • The rman target/ command is used to maintain backup copies by connecting to the target database and returns the RMAN prompt to issue further backup commands.
  • The redo files are opened after executing the ALTER DATABASE OPEN command on a database when it is in MOUNT mode.

Understanding Globalization Support
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OCP 1Z0-047 Short Notes: Exam passing tips

Retrieving data using the SQL SELECT statement and using single row functions to customize the output

  • /*…*/ and — are used to put comments in an Oracle program.
  • The CREATE TABLE does not end immediately with a semicolon, and a column name cannot start with a numeric value. However, a numeric value can be used in between a column name.
  • Name of a table cannot start with @ special character.
  • Knowing about the GROUP BY clause.

Using sub queries and set operators to solve queries, as well as DDL statements to create and manage tables

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OCP 1Z0-045 Short Notes: Exam passing tips

General high availability technologies in 10g

  • The ORDER BY clause sorts the records in ascending order and it comes last in the SELECT statement.
  • The Online redo log files and the operating system flat file are used to store a copy of a data dictionary.
  • RMAN can be used to take an incremental backup for tablespaces and data files.
  • The rman target/ command is used to maintain backup copies by connecting to the target database and returns the RMAN prompt to issue further backup commands.
  • The NLS_LANG parameter must be set to specify the language, territory, and character set used in an application.
  • CONFIGURE is an RMAN command that configures an RMAN environment.
  • CONFIGURE RETENTION POLICY CLEAR is a command that will configure the retention policy to the default of REDUNDANCY 1.
  • RMAN is used to migrate the database files from conventional file system storage to ASM storage.
  • The control file, target database catalog, and Recovery catalog are used to store the RMAN’s persistent settings.
  • The redo files are opened after executing the ALTER DATABASE OPEN command on a database when it is in MOUNT mode.
  • RMAN can be used to move database objects from a non-ASM disk location to an ASM disk group.
  • The V dynamic performance view includes the status, the location where the block change tracking file is stored, and the size in bytes of the file.

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