How to Ensure MySQL Query Success in Data Modification?

Testing MySQL Query Success for Database Table Data Modification

In database operations, it is crucial to validate whether a query successfully modified the target table data. This becomes especially important when controlling the flow of subsequent actions based on the query outcome.

Let's consider a PHP code snippet that aims to remove an article from a database based on article number (ARTICLE_NO). After execution, the result is communicated to a JavaScript function via AJAX. The goal is to echo "true" if the query succeeds and "false" if it fails.

The provided code checks if the SQL statement is prepared successfully but overlooks the actual modification of the table data. To rectify this, we can utilize the affected_rows property of the prepared statement.

Here's the revised code:

<code class="php">...
$delRecord->execute();
echo ($delRecord->affected_rows > 0) ? 'true' : 'false';
$delRecord->close();</code>

This check evaluates whether any rows were affected by the query. A count greater than zero indicates a successful modification, prompting the response of "true." Otherwise, it returns "false."

Remember, this only validates the modification of the table data. Verifying the correct handling of the result string in the JavaScript code may require further exploration with additional context.

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