Oracle Database Concepts

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 different language such as C or Java.

Oracle Database SQL Language (introduction of SQL)

Oracle Online Training

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