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Normalization in SQL is a fundamental concept of database design. In this video, you will learn the basics of normalization and understand the different types of keys in a database. You will look the various types of normal formals and address issues such as partial dependency and transitive dependency. You will understand how 1NF, 2NF, 3NF and BCNF can solve these issues, reduce redundancy and help achieve data integrity.
The below topics are covered in this video:
00:00 What is Normalization?
02:04 What is a Key?
03:40 Types of Keys
07:25 Types of Normal Forms
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What is Normalization in DBMS?
The Normalization theory was first explained by IBM researcher E.F. Codd in the 1970s. In a database, a large amount of data is stored in different tables. There can be the possibility of redundancy being present in the data. So normalization aims to eliminate this redundancy from the data and ensures data integrity. Using normalization techniques, you can split a large table into smaller tables and define relationships between them to enhance the clarity in organizing data. It also removes anomalies like Insert, Update and Delete Anomalies.
What is SQL?
SQL stands from Structured Query Language. It is used to communicate with several relational databases such as MySQL, Oracle and MS SQL Server. Using SQL queries, you can fetch, update, delete and manipulate data that is stored in the form of rows and columns. SQL became the de facto standard programming language for relational databases after they emerged in the late 1970s and early 1980s. You can also permit users to perform specific tasks on tables, procedures, and views. SQL commands are divided into different types, such as data manipulation language (DML), data definition language (DDL), transaction control language (TCL), and data query language (DQL).
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