Here are some nice links for important contents about database systems.
A nice and succinct tutorial on ERDs is as follows.
What is entity relationship diagram? – Definition from WhatIs.com
A Quick Guide to Database Normalizing with First Normal Form (1NF)
Valuable tutorials about normalization.
Normalization in DBMS: 1NF, 2NF, 3NF and BCNF in Database
Normalization is a process of organizing the data in database to avoid data redundancy, insertion anomaly, update anomaly & deletion anomaly. Let’s
1NF, 2NF, 3NF and BCNF in Database Normalization | DBMS Tutorial | Studytonight
Here is a very nice course about database systems by MIT OCW.
Here is a nice course on Database management by Coursera.
Database Management Essentials – University of Colorado System | Coursera
A nice tutorial on 4NF.
Database Normalization: 4th Normal Form
Beyond Boyce-Codd normal form with 4th normal form
A nice tutorial on 5NF.
Database Normalization: 5th Normal Form and Beyond
Normal forms beyond 4th are mainly of academic interest
Fifth Normal Form (5NF) – 5NF in DBMS – 5NF in Database
Fifth Normal Form – A database is said to be in 5NF, if and only if it is in 4NF anlong with additional conditions which are explained here.
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