Understanding Table Union Operation

The question asks us to find the result of the UNION operation between two tables, referred to as $TableA$ and $TableB$. The UNION operation is used to combine the result sets of two or more SELECT statements. It retrieves all unique rows from the combined tables.

Defining Table A and Table B

First, let's clearly identify the data contained within each table:

Table A Contents:

Table B Contents:

Performing the Union (TableA U TableB)

The UNION operation combines rows from both tables. If a row exists in both tables, it is included only once in the final result. This ensures uniqueness.

We can think of the tables as sets of rows:

Let $A$ represent the set of rows in $TableA$: $A = \{ (\text{Anu, Dance}), (\text{Anuj, Music}) \}$

Let $B$ represent the set of rows in $TableB$: $B = \{ (\text{Prannav, Reading}), (\text{Anuj, Music}) \}$

The union operation, denoted as $A \cup B$, combines all distinct elements (rows) from both sets.

Combining all rows from both tables initially yields:

• (Anu, Dance) - from Table A
• (Anuj, Music) - from Table A
• (Prannav, Reading) - from Table B
• (Anuj, Music) - from Table B

We identify that the row '(Anuj, Music)' is present in both $TableA$ and $TableB$. The UNION operation automatically handles this duplication by keeping only one instance of this row.

Final Result of Table Union

Therefore, the resulting table after performing the UNION operation ($A \cup B$) contains all the unique rows from both tables:

The union $A \cup B = \{ (\text{Anu, Dance}), (\text{Anuj, Music}), (\text{Prannav, Reading}) \}$

This is represented in the table below:

This final table correctly shows all the unique combinations of Name and Hobbies found across both $TableA$ and $TableB$.