The structured query language, Database Management System

The Structured Query Language

INTRODUCTION

Database is an organised set of information about an entity having controlled redundancy and serves numerous applications. DBMS (database management system) is application software that is developed to make and influence the data in database. A query language can simply access a data in a database. SQL (Structured Query Language) is language used by most relational database systems. IBM developed the SQL language in mid-1979. All communication with the RDBMS and the clients or among RDBMS is by SQL. Whether the client is a disguised engine or a basic SQL engine such as a GUI, one RDBMS talking to another or report writer, SQL statements pass from the client to the server. The server responds by processing the SQL and returning the results. The benefits of this approach are that the only network traffic is the first query and the resulting response. The processing power of the client is reserved for running the application.

SQL is a data sub-language having of three built-in languages: Data definition language (DDL), Data manipulation language (DML) and Data  control language (DCL). It is a fourth generation language. SQL has many more benefits and features. It should be noted that a lot of commercial DBMS may or may not execute all the details given in this unit. For instance, MS-ACCESS does not support some of these features. Even some of the constructs  may  not  be  portable,  please  consult  the  DBMS  Help  for  any  such dissimilarity.

 

 

Posted Date: 3/8/2013 6:18:57 AM | Location : United States







Related Discussions:- The structured query language, Assignment Help, Ask Question on The structured query language, Get Answer, Expert's Help, The structured query language Discussions

Write discussion on The structured query language
Your posts are moderated
Related Questions
Explain controlled redundancy? Controlled redundancy : The replication of data within the data warehouse for the purposes of improved data access or understand ability.



construct a b-tree for the following set of key values 2,3,5,7,11,17,19,23,29,31.assume that the tree is initial empty and the values are added in ascending order


Explain the dependency relationship of object oriented A dependency is a relationship which states that a change in specification of one thing can affect another thing, but n

Explain three main attributes of data.

Have database built but having problems with some questions that go with the database

Two Phase Locking (2PL) The two-phase locking protocol having of two phases: Phase 1 : The lock acquisition phase : If a transaction T needs to read an object, it wants to

Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.