What is the minimal set of attributes that can uniquely identify a tuple in a relational database table?

The minimal set of attributes that can uniquely identify a tuple in a relational database table is known as the Primary Key.

Here are the steps to identify it:

1. Analyze the table: Look at the table and understand what information it contains. Each row in the table is a tuple.

2. Identify unique attributes: Find out which attributes (or columns) contain unique information for each tuple. This could be an ID number, a username, an email address, or any other attribute that is different for each tuple.

3. Check for minimal set: The primary key should be as small as possible. This means that if you can identify a tuple using fewer attributes, you should do so. For example, if you have both an ID number and a username for each tuple, and both are unique, you should choose only one as the primary key.

4. Test the key: Once you have identified a potential primary key, test it to make sure it is unique for each tuple. If it is, you have found the minimal set of attributes that can uniquely identify a tuple.

5. If no single attribute is unique, then look for a combination of attributes that is unique for each tuple. This combination of attributes is known as a composite key.

Remember, the primary key of a table is crucial for identifying records, maintaining data integrity, and building relationships between tables.