Database management is a very important part of any organisation. The organisation needs to maintain many details. All these cannot be maintained using files. With this need evolved d use of databases and database management systems. For example, maintaining the employee details, storing of the information in a project, etc. Maintaining a database includes adding new details, modifying the already existing contents, deleting the data. The data stored in the database are accessed using database connectivity. SQL- structured query language is the most commonly used language for accessing and modifying databases. The databases include tables, files, etc. For eg MS-Access, excel, etc. Using java the connectivity is established using JDBC. The other objects accesses using ODBC.