Handling Errors and Exceptions

When working with database connectivity in frontend development, it is important to handle errors and exceptions properly. Error handling ensures that your application gracefully handles unexpected situations and provides helpful feedback to users.

One common error handling technique is to use try-catch blocks. When executing database queries, you can wrap the query code within a try block and catch any errors that occur within the catch block.

Here's an example of how you can handle errors when executing an SQL query in a JavaScript frontend application:

1// Replace with JavaScript code that demonstrates error handling in database connectivity
2try {
3  // Execute SQL query
4  connection.query('SELECT * FROM users', (error, results) => {
5    if (error) {
6      throw error;
7    }
8    console.log(results);
9  });
10} catch (error) {
11  console.log('An error occurred:', error);
12}

In this example, the connection.query method is wrapped within a try block. If an error occurs during the query execution, it will be caught in the catch block, where you can handle the error accordingly.

By handling errors and exceptions properly, you can improve the reliability and user experience of your frontend application when working with database connectivity.

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// Replace with JavaScript code that demonstrates error handling in database connectivity

try {

  // Execute SQL query

  connection.query('SELECT * FROM users', (error, results) => {

    if (error) {

      throw error;

    }

    console.log(results);

  });

} catch (error) {

  console.log('An error occurred:', error);

}