How to Pass Parameters to a MySQL Query Callback in Node.js?

Passing Parameters to MySQL Query Callback in Node.js

In Node.js, you can pass custom data to a MySQL query callback using the query method's parameter array. When the callback is invoked, the data is accessible within the function's parameters.

Solution

To pass parameters to the query callback, follow these steps:

1. Create an array containing the query parameters.
2. Call the query method with the SQL query and the parameter array.
3. Define the callback function with the parameters (err, result) or (err, rows, fields).
4. Access the parameters within the callback function.

Example:

// Prepare the parameter array
const parameters = [user_id, start, limit];

// Execute the query
connection.query(
    'SELECT * FROM table WHERE>

This approach automatically escapes the parameters, ensuring the security of your queries.

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