How to Retrieve Distinct Values from One Column While Keeping Corresponding Data in MySQL?

DISTINCT Column Retrieval with Corresponding Data in MySQL

In a database table containing multiple columns, such as the one illustrated below:

a common task is to retrieve distinct values from a specific column while maintaining the corresponding data from other columns.

The Objective:

Obtain distinct results from the FirstName column while including the corresponding ID and LastName values. Specifically, only one John should be returned, with an ID of 1 and a LastName of Doe.

The Solution:

To achieve this, the following MySQL query can be employed:

SELECT ID, FirstName, LastName
FROM table
GROUP BY(FirstName)

Query Explanation:

• The GROUP BY(FirstName) clause categorizes the rows based on the FirstName column.
• By using this grouping, the query selects the first row within each FirstName category, retaining its ID and LastName values.
• In the case of duplicate FirstNames, only one row is chosen, ensuring distinct results.

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