Merge pull request #7 from 06-NA/patch-4

BCA: DBMS: solve half of assignment

NEP2020/2024/BCA/3rdsem/dbms/assignments/normalisation.md

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+# Assignment 1
+
+## Write a note on decomposition with examples.
+Decomposition refers to the division of tables into multiple tables to produce consistency in the data.
+
+![Types](https://media.geeksforgeeks.org/wp-content/uploads/20240225103808/Screenshot-2024-02-25-103756.png)
+
+### Types of Decomposition
+
+There are two types of Decomposition:
+- Lossless Decomposition
+- Lossy Decomposition
+
+### Lossless Decomposition
+The process in which where we can regain the original relation R with the help of joins from the multiple relations formed after decomposition. This process is termed as lossless decomposition.
+
+It is used to remove the redundant data from the database while retaining the useful information.
+
+The lossless decomposition tries to ensure following things:
+- While regaining the original relation, no information should be lost.
+- If we perform join operation on the sub-divided relations, we must get the original relation.
+
+EXAMPLE:
+There is a relation called R(A,B,C)
+|**A**|**B**|**C**|
+| ---| ---| ---|
+| 55 | 16 | 27 |
+| 48 | 52 | 89 |
+
+
+
+
+
+### Lossy decomposition:
+
+## Source:
+- Q1 answer - [GeeksForGeeks](https://www.geeksforgeeks.org/decomposition-in-dbms/)