Which is the preferred Normal Form(NF) in reporting applications?1 NF2 NF3 NFAll of the above

The preferred Normal Form (NF) in reporting applications is 3NF (Third Normal Form).

Here's why:

1NF (First Normal Form) is the most basic level of normalization. It eliminates duplicate columns from the same table and creates separate tables for each group of related data.

2NF (Second Normal Form) goes a step further by removing subsets of data that apply to multiple rows of a table and placing them in separate tables.

3NF (Third Normal Form) is the preferred form for most applications. It removes columns that are not dependent upon the primary key. This means that each non-key column must be a fact about the key, the whole key, and nothing but the key. This level of normalization is sufficient for most applications, including reporting applications, and ensures that your data is free from update, insertion, and deletion anomalies.

So, the answer is 3NF.