Assignment and homework help in ORACLE

ORACLE

ORACLE  Database which is also referred as Oracle RDBMS or Oracle is basically an ORDBMS (object-relational database management system) which is marketed and also produced by Oracle corporation. 

Physical and logical structure of Oracle

An Oracle database system is identified by an alphanumeric system identifier which has at least 1 instance of the application along with the data storage. An instance which is identified generally comprises of a set of OS and memory structures that interacts with the storage.

The users of oracle databases generally refer to the server side memory structure as System Global Area. SGA hold cache information such as SQL commands, data buffers, user information etc. The database also consists of online redo logs – thereby holding the history of the transactions occurred.

If the administrator of the Oracle database has implement Real Application Cluster(RAC), then the multiple instances which are generally on different servers do attach to the central storage array. This scenario would offer several advantages such as scalability, redundancy, better performances etc. But this also has the disadvantage of increasing the complexity of support and hence most of the sites do not use RAC.

Oracle DMBS also has the capability to execute the stored functions and procedures within itself. Either Java language or PL/SQL (Oracle Corporation's proprietary procedural extension to SQL) can invoke such code objects and also provide the programming structures for writing them.

Storage

Oracle stores the data physically in form of data files and logically in the form of tablespaces. The tablespaces do contain several types of memory segments such as Index Segments, Data Segment etc. These segments in turn consists of one or more than one extents. The extent comprises of continuous data blocks and the data blocks are the ones which form the basic unit of data storage.

A partitioning feature is also available on the new versions of the database which allows the tables to be partitioned on the basis of different set of the keys. Certain partitions can easily be dropped or added to help manage the large data sets.

Online Homework help in Website in ORACLE

Tutors Kingdom is a place where each and every student can get answers to their doubts relating to various different programs such as Oracle. You can easily submit us you school, university or college level work to us. Our tutors ensure to provide you not only good solutions but also try their level best to make the assignment in way which could increase your knowledge and understanding. We have highly certified and qualified tutors, college professors etc in Oracle. Our tutors are ready to share their valuable experience with students for cheap prices.