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A Database consists of the following components.Schema - A Schema is a logical grouping of a set of database tablesTable - A table is a logical sub unit of information that is split up into rows and columns - much like the MS XL spreadsheetAll the data that is stored in a database is organized into tables and schemas.Apart from this, a database can have:ViewsFunctionsStored Proceduresetc
To efficiently retrieve data from a database using Oracle, you can optimize your queries by using indexes, limiting the columns selected, and avoiding unnecessary joins. Additionally, consider using bind variables and tuning the database performance settings for better efficiency.
Database management system is a software system (set of programs) that is used for the management of databases. Now to understand Database management system it is necessary to know about databases. Database is a data structure used to organize related data. In databases data is stored in such a way that it can be easily accessed and changed easily. Normally a database is a collection of tables. A table itself can also be called as database and Table is a collection of columns and rows. Database administration is a method of tending to or managing the affairs of electronic data and the person who perform these activities is called Database Administrator. A database administrator (DBA) is responsible for the design, implementation, maintenance and repair of an organization's database.
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Database comprises of records that are related to each other. In database the data is stored in the form of tables, are called database tables .