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SQL INTERVIEW QUESTIONS & ANSWERS

Databases
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1. What does the acronym SQL stand for?
  SQL stands for Structured Query Language.
  Posted by K.Supravallika. (Mar 21, 2014)
 

Standard Query Language
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2. Define SQL?
  Structured query language is the standard command set used to communicate with the relational database management system.
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3. What are the advantages of SQL?
 
  • SQL is a high level langauge that provides a greater degree of abstraction than procedural languages.
  • The language while being simple and easy to learn can handle complex situations.
  • Applications written in SQL can be easily ported across systems.
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4. What are the six main categories of SQL commands?
 
  • Data Definition Language (DDL)
  • Data Manipulation Language (DML)
  • Data Query Language (DQL)
  • Data Control Language (DCL)
  • Data Administration Commands (DAC)
  • Transactional Control Commands (TCC)
  Posted by Tamildhasan. (Oct 19, 2013)
 

View Definition Language (VML); Storage Definition Language (SDL)
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5. What is data?
  Data is a collection of information stored in a database as one of several different data types.
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