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Introduction to Oracle SQL Structured Query Language (SQL) is the set of statements with which all programs and users access data in an Oracle Database. Application programs and Oracle tools often allow users access to the database without using SQL directly, but these applications in turn must use SQL when executing the user's request. This chapter provides background information on SQL as used by most database systems . These chapter contains 4 important topics: ·           History of SQL ·          SQL Standards ·           Lexical Conventions ·          Tools Support Are looking for Oracle training in Chennai

Database Concepts SQL (pronounced  sequel ) is the set-based, high-level declarative computer language with which all programs and users access data in an Oracle database. Although some Oracle tools and applications mask SQL use, all database operations are performed using SQL. Any other data access method circumvents the security built into Oracle Database and potentially compromises data security and integrity. SQL provides an interface to a relational database such as Oracle Database. SQL unifies tasks such as the following in one consistent language: Creating, replacing, altering, and dropping objects Inserting, updating, and deleting table rows Querying data Controlling access to the database and its objects Guaranteeing database consistency and integrity SQL can be used  interactively , which means that statements are entered manually into a program. SQL statements can also be  embedded  within a program written in a differ...

History of SQL Dr. E. F. Codd published the paper, "A Relational Model of Data for Large Shared Data Banks", in June 1970 in the Association of Computer Machinery (ACM) journal,  Communications of the ACM . Codd's model is now accepted as the definitive model for relational database management systems (RDBMS). The language, Structured English Query Language (SEQUEL) was developed by IBM Corporation, Inc., to use Codd's model. SEQUEL later became SQL (still pronounced "sequel"). In 1979, Relational Software, Inc. (now Oracle) introduced the first commercially available implementation of SQL. Today, SQL is accepted as the standard RDBMS language. SQL Standards Oracle strives to comply with industry-accepted standards and participates actively in SQL standards committees. Industry-accepted committees are the American National Standards Institute (ANSI) and the International Organization for Standardization (ISO), which is affiliated with the I...

8 Things Every Beginner Oracle DBA Should Know Installing and configuring Oracle: Procedures and caveats of installing Oracle across different OS — Linux, Windows Server, Unix, to name a few — can vary considerably. Each platform has its own peculiar and specific requirements. Knowing about Oracle installation procedures is a strong point, but there is no substitute for practical experience. Read, listen, observe, and always be on the lookout for opportunities to get that practical experience. Are you looking for the Oracle Training in Chennai Basic monitoring and tuning: There are so many diverse issues that can affect the performance of an Oracle database. As a new DBA you should be able to understand the type of bottlenecks that can take place and be able to find solutions. To mention just a few: Use common wait events, check if the right index is being used, and rebuild indexes and tables if necessary to remove fragmentation. Backing up and recovering data...