ORACLE DBA INTRODUCTION: Undo Introduction offline status Pending Rollback segments Features of Flashback Flashback Table Flashback query Flashback Version query
ORACLE DBA What is bulk copy or BCP in oracle? BCP or bulk copy tool is one type of command line tool for unload data from database came into existence after oracle 8 .it is used to import or export data from tables and views but it will not copy structure of data same. Main advantage is fast mechanism for copying data and we can take backup of important data easily.
ORACLE DBA ď‚— This illustrates that like most industry buzzwords, Big
is a cynical spin on what should more often be called awkward. A billion rows of normalized data in a welldesigned schema might be large, but it's hard to see a big pay packet coming from running an aggregate function like Average on it. To be a lucrative skill there has to be some pain that you can overcome for your patient employer.
ORACLE DBA Save point are used to divide a transaction into smaller parts. It enables rolling back part of a transaction. Maximum of five save points are allowed. Whenever we encounter error we can rollback from the point where we set our save point. This is useful for multistage transaction and conditional transaction where commit and rollback depend on certain condition. This is another commonly asked Oracle Interview Question and since save points are also available in other database e.g. SQL Server, some time Interviewer follow up with differences with other database as well.
ORACLE DBA
ORACLE DBA ď‚— Database Administrators (DBAs) are responsible for the design,
implementation, support and maintenance of computerized databases in today's organizations. The role also includes architecting, building and scaling databases for future data growth and capacity. They are also responsible for security, performance and availability of data to users and customers. .
ď‚— All the above tasks are performed with the help of a Database Management
System (DBMS) and the leading and most widely used DBMS across the world today are the Oracle Database, Microsoft SQL Server, My SQL database etc. Out of the three DBMS technologies, Oracle Database is the most popular and widely used database in the world today.
ORACLE DBA
ORACLE DBA Each database requires at least one database administrator (DBA) to administer it. Because an Oracle database system can be large and can have many users, often this is not a one person job. In such cases, there is a group of DBAs who share responsibility.
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