How to Access Ambiguous Column Names in SQL Query Results Using PHP?

Resolving ambiguous column names in SQL queries

When retrieving data from multiple tables that contain common column names, ambiguity may arise when accessing column values ​​in the resulting associative array. To solve this problem, consider the example of joining the NEWS table with the USERS table, both tables contain an "id" column.

Problem Statement

Execute SQL query:

<code class="language-sql">SELECT * FROM news JOIN users ON news.user = user.id</code>

Using PHP, how can I retrieve the news ID and user ID (both have the same column name) from an associative array returned by a query?

Answer

To disambiguate column names, assign each column a unique alias in the SELECT clause:

<code class="language-sql">$query = 'SELECT news.id AS newsId, user.id AS userId, [OTHER FIELDS HERE] FROM news JOIN users ON news.user = user.id';</code>

By specifying aliases for column names, you can access specific values ​​using:

• $row['newsId'] Get News ID
• $row['userId'] Get user ID

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