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What is database normalization?

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There are several normalization techniques. 1. First normal form - Its tables without any joins 2 Second normal form - It establishes relation between two tables. A is related to b . where a, b are tables. 3 Third normal form - It is transitive relation between tables. A relates to B and B relates...
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There are several normalization techniques. 

1. First normal form - Its tables without any joins 

2 Second normal form - It establishes relation between two tables. A is related to b . where a, b are tables. 

3 Third normal form - It is transitive relation between tables. A relates to B and B relates to C then A relates to C . 

4. Boy-code normal form.

3 Third normal form - 

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