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Database and types of database
The document discusses different types of databases including relational, document oriented, embedded, graph, hypertext, operational, distributed, and flat file databases. It provides details on relational databases describing their use of tables, rows, columns, primary keys, and foreign keys. Document oriented databases are described as storing documents similar to records in relational databases but without uniform field sizes. Graph databases use graph structures with nodes and edges to represent data.
Database and types of database
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- 3. DATABASE MANAGEMENT SYSTEM ADatabase is a collection of records. Database management systems are designed as the means of managing all the records. DBMS is a software system designed to allow the definition , update , retrieval and administration of databases.
- 4. TYPES OF DATABASE •Relationaldatabase •Document oriented database •Embedded database •Graph database •Hypertext database •Operational database •Distributed database •Flat file
- 5. RELATIONAL DATABASE A relationaldatabase is a database that has a collection of tables of data items. Data in a single table represents a relations. Tables consist of rows and columns. The columns constitute the attributes. The rows constitute tuples.
- 6. • Row-A dataset representing a single item. • Column-A labeled element of a tuple, e.g. "Address" or "Date of birth”, of multiple data item.
- 7. A primary keyis used to uniquely identify each row. The foreign key a column or group of columns in one table that points to the primary key of another table.
- 8. DOCUMENT ORIENTED DATABASE Acomputer program designed for storing, retrieving and managing document oriented information. Documents inside a document-oriented database are similar to records or rows in relational databases. Do not store data in tables with uniform sized fields for each record.
- 9. Any number offields of any length can be added to a document.
- 10. EMBEDDED DATABASE •The databasesconsist of data developed by individual end users. •Examples of these are collection of documents, spreadsheets, presentations and other files.
- 12. GRAPH DATABASE A graphdatabase is a database that uses graph structures with nodes, edges, and properties to represent and store data. A graph database is any storage system that provides index-free adjacency. This means that every element contains a direct pointer to its adjacent elements.
- 14. HYPERTEXT DATABASE Hypertext databasesare particularly useful for organizing large amount of disparate information. Hypertext is text displayed on a computer display or other electronic devices with references to other text which the reader can immediately access. Pages often written in HTML.
- 16. OPERATIONAL DATABASE An operationaldatabase contains data about the things that go on inside an organization or enterprise. Example: data on customer complaints, employee information, etc.
- 17. DISTRIBUTED DATABASE It isa database in which portions of the database are stored on multiple computers within a network. The DDBMS synchronizes all the data periodically. Updates and deletes performed on the data at one location will be automatically reflected in the data stored elsewhere.
- 18. FLAT FILE A flatfile database is a database that stores data in a plain text file. Flat files are ideal for small amount of data. Each line of the text file holds one record, with fields separated by delimiters, such as commas or tabs.
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