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SQL Tutorial

It was challenging to retrieve information from databases before the inception of Structured Query Language (SQL). The data recovered was disparate, redundant and disorderly, since there was no proper method to fetch it and arrange it in a concrete structure.

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With the introduction of SQL, initially developed by IBM Corporation, developers and data administrators got a persistent solution to deal with relational databases over ORMs (used before). Since each operation in your business involves interaction with large databases, it is essential to achieve faster retrieval of data and information using structured queries that are easy-to-understand and simple-to-write.

SQL is the most popularly and frequently used language for faster query, higher data integrity between tables and databases, executing multiple queries in minutes and ensuring excellent data modeling. We have designed an elaborative learning reference, which will give you good understanding of SQL and its commands.  Starting from the introduction to the importance and purpose of SQL to its properties, each of these topics is well explained with suitable examples.

Following points will give you a clearer view about SQL:

  • The system and SQL engine figure out the best way to execute the command
  • Is an ANSI standard nevertheless different versions of SQL are available
  • A widely adopted query language for relational database management system.

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SQL versus MySQL

These two are basically the confusing due to the names. However there is a significant difference between these two concepts. Let’s explore it in brief:

SQL MySQL
Special purpose language Open source database management system
Used to issue instructions for the DBMS Used to store data for manipulation
Does not undergo any changes Undergoes changes and upgradations

You get familiar with DDL and DML, ACID Properties and Normalization in RDBMS. Several SQL features and SQL Data Types are also included in this tutorial. You will learn how to create, select and drop database,  drop a table and perform SQL operations using INSERT and SELECT statements.

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This tutorial is a complete learning that includes concepts of Where Clause, AND & OR Clause, Update Query, Delete Query, Order By, Group By, Distinct, Alter, IN and BETWEEN, Like Clause, Union, Constraints used in SQL and Joins.

If you like reading this tutorial, you can also browse through our training courses on SQL Server DBA and SQL Developer and a combination of both. Intellipaat’s training courses offer intuitive and exemplary learning such that you get to create live projects at the end and clarify all your doubts and concerns regarding SQL. We also prepare you for SQL Professional Certification exams and help you get jobs in your field. Course completion certificate from Intellipaat is also offered at the end of training course.

Recommend Audience

  • Developers and Database Administrators
  • Software Developers and Architects
  • Students and Professionals who are willing to become SQL Developers and SQL Server DBA and build prime career in the field of Database Management

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Prerequisites

  • Basic understanding of computer programming language, internet, database, especially RDBMS is very helpful.

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