Database Languages

A database system provides a data definition language to specify the database schema and a data manipulation language to express database queries and updates. In practice, the data definition and data manipulation languages are not two separate languages; instead they simply form parts of a single database language, such as the widely used SQL language. … Read more

Characteristics of Database

The database approach has some very characteristic features which are discussed in detail below: Concurrent Use A database system allows several users to access the database concurrently. Answering different questions from different users with the same (base) data is a central aspect of an information system. Such concurrent use of data increases the economy of … Read more

Identifying Server-Side Functionality

It is often possible to infer a great deal about server-side functionality and structure, or at least make an educated guess, by observing clues that the application discloses to the client. Dissecting Requests Consider the following URL, which is used to access a search function: https://wahh-app.com/calendar.jsp?name=new%20applicants&isExpired= 0&startDate=22%2F09%2F2006&endDate=22%2F03%2F2007&OrderBy=name As we have seen, the .jsp file extension … Read more

MongoDB releases mobile specific version of its NoSQL database

nosql

MongoDB releases mobile specific version of its NoSQL database Database specialist MongoDB has made a range of announcements this week during MongoDB World – which is back in New York for its first year as a publicly listed company – including a new mobile version of its core database and the addition of ‘global clusters’ … Read more

What is Database

database

What is database? Database is an organized collection of information about an entity having controlled redundancy and serves multiple applications. DBMS (database management system) is an application software that is developed to create and manipulate the data in database. A query language can easily access a data in a database. SQL (Structured Query Language) is … Read more