Why is My PDO Update Query Failing to Modify Specific Rows in MySQL?

Using PDO for MySQL Update Queries

When attempting to update a database row using PDO and MySQL, you may encounter a scenario where your code fails to execute. This guide explores the possible reasons for this error and provides a solution.

Error: Incorrect UPDATE Syntax

The error you encounter stems from an incorrect UPDATE syntax. Specifically, your query is attempting to replace all rows in the access_users table with the provided values, rather than updating a specific row.

Solution: Targeted Row Update

To update a specific row, you need to include a WHERE clause that identifies the row you want to modify. Here's the corrected query:

<code class="sql">UPDATE `access_users`
SET `contact_first_name` = :firstname,
    `contact_surname` = :surname,
    `contact_email` = :email,
    `telephone` = :telephone
WHERE `user_id` = :user_id;</code>

Conclusion

By incorporating a WHERE clause, you can target a specific row and perform the update successfully. Remember to adjust the user_id field based on the unique identifier for each row in your access_users table.

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