Certainly! Here's a SQL query that retrieves the names and email addresses of customers from the "customers" table where the city is "New York." I've included comments to explain the purpose of the query and potential optimizations: ```sql -- Purpose: Retrieve names and email addresses of customers in New York. -- Query: SELECT name, email FROM customers WHERE city = 'New York'; -- Optimization: -- 1. Indexing: Ensure there is an index on the 'city' column in the 'customers' table to speed up the WHERE clause filtering. -- 2. If the 'customers' table is exceptionally large, consider using a covering index on the 'name' and 'email' columns to further optimize the query. -- 3. Regularly maintain and update the index statistics for optimal query performance. ``` This query will select the 'name' and 'email' columns for customers whose city is 'New York' from the "customers" table. The comments suggest potential optimizations, such as indexing the 'city' column and considering a covering index on the selected columns for improved performance, especially if the table is large. Regular maintenance of index statistics is also recommended for long-term query efficiency.