| Normalization involves removing redundant data (multiple copies of data) from a database and storing consistent, non-redundant data. |
It involves combining data from multiple tables into a single so that it can be queried quickly. |
| It primarily focuses on clearing out unused data and reducing duplicate data and inconsistencies from a database. |
On the other hand, denormalization aims to achieve faster query execution by adding data redundancy. |
| During normalization, tables are reduced in number due to the reduction of data in the database. |
Denormalization, on the other hand, involves integrating data into the same database and therefore the number of tables to store the data increases. |
| Data integrity is maintained by normalization. A change to the data in the table will not impact its relationship with the other table. |
Data integrity is not maintained by denormalization. |
| It optimizes the use of disk space. |
It does not optimize disk space. |
