5th normal form (5NF), also known as project join normal form, requires a relation to be in 4NF without any join dependency, ensuring lossless-join decomposition. This means that the original data is preserved without introducing additional tuples. An example of achieving 5NF involves decomposing a table into three relations.

1. 5th
normal
form(5NF)
BY,
ABHISHEK K N
4MN21AD002

2. •It is also called as project join normal form.
•A relation R is in 5NF if it is in 4NF and there is no join dependency.
•No join dependency means lossless-join decomposition.
•Decomposition is lossless-join decomposition, if it preserves all the data in original
relation and does not result in additional tuples.
Example

3. Make The Table Into 5NF, We Can Decompose It Into Three
Relations P1, P2 & P3:
P1 P2
P3