Create 301read14.md

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301read14.md

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+# Normalizing a database
+
+## What is it?
+
+Database normalization is a process used to organize a database into tables and columns.
+
+Each table should be a specific topic.
+
+The 3 main reasons to normalize the database:
+
+- Minimize duplicate data
+- Minimize or avoid data modification issues
+- Simplify queries
+
+## How to Normalize
+
+There are three common forms of database normalization: 1st, 2nd, and 3rd normal form. They are also abbreviated as 1NF, 2NF, and 3NF respectively. 
+
+The forms are progressive, meaning that to qualify for 3rd normal form a table must first satisfy the rules for 2nd normal form, and 2nd normal form must adhere to those for 1st normal form.
+
+- First Normal Form – The information is stored in a relational table with each column containing atomic values. There are no repeating groups of columns.
+- Second Normal Form – The table is in first normal form and all the columns depend on the table’s primary key.
+- Third Normal Form – the table is in second normal form and all of its columns are not transitively dependent on the primary key