How to Retrieve the Last Inserted ID in MySQL with Node.js?

Retrieving the Last Inserted ID with MySQL and Node.js

When dealing with database operations, there are often scenarios where you need to retrieve the ID of the recently inserted row. In MySQL, this can be achieved using the mysqli_insert_id() function. However, for Node.js MySQL users, there are some limitations and security concerns associated with this method.

Overcoming Limitations and Security Risks

The limitations and risks mentioned in the question include:

1. Lack of Table Specificity: mysqli_insert_id() does not allow specifying the table for which you want to retrieve the ID.
2. Potential ID Retrieval Collision: Multiple queries executed concurrently could result in incorrect ID retrieval.
3. Compatibility with Node.js MySQL: mysqli_insert_id() is a PHP function and not directly applicable in Node.js MySQL.

Solution Using connection.query()

To address these challenges, you can utilize the connection.query() method in Node.js MySQL, as described in the documentation. This approach offers greater control and security:

connection.query('INSERT INTO posts SET ?', {title: 'test'}, function(err, result, fields) {
  if (err) throw err;

  console.log(result.insertId);
});

In this example, after executing the insert query, the result object contains the insert ID in the insertId property. This method ensures that you retrieve the correct ID and eliminates the risks associated with using mysqli_insert_id().

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