How can I pass the selected value from a dropdown list in a JSP page to perform a MySQL query?

To pass the selected value from a dropdown list in a JSP page to perform a MySQL query, you can use JavaScript/jQuery to get the selected value and then pass it to a JSP Servlet which handles the MySQL query. Here is an example of how you can achieve this:

```html

function submitForm() {
var selectedValue = document.getElementById("selection").value;
// You can use AJAX to pass the selected value to a JSP Servlet
// Example AJAX call:
/*
$.ajax({
type: "POST",
url: "myServlet",
data: { selectedValue: selectedValue },
success: function(response) {
console.log("Query result: " + response);
}
});
*/
// For demonstration purposes, we are just logging the selected value
console.log("Selected value: " + selectedValue);
}

```

In this example, when a user selects an option from the dropdown list and clicks the "Submit" button, the `submitForm()` function is called to get the selected value. You can then use AJAX to pass this value to a JSP Servlet where you can perform a MySQL query using the selected value.

Remember to replace `"myServlet"` with the actual URL of your JSP Servlet handling the MySQL query.