LeetCode 1082: Sales Analysis I Solution

Master LeetCode problem 1082 (Sales Analysis I), a easy challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

1082. Sales Analysis I

Easy

Database

Problem Explanation

Explanation

The problem requires us to find the IDs of customers who have made more than one transaction. We are given a table Orders with columns customer_id and order_id.

To solve this problem, we can use SQL to group the data by customer_id and count the number of orders made by each customer. We can then filter the results to include only those customers who have made more than one transaction.

SQL Solution

Solution Code

// Java solution
// Note: JDBC connection and result set handling is not included in this code snippet

String sqlQuery = "SELECT customer_id FROM Orders GROUP BY customer_id HAVING COUNT(order_id) > 1";
PreparedStatement ps = conn.prepareStatement(sqlQuery);
ResultSet rs = ps.executeQuery();

while (rs.next()) {
    int customerId = rs.getInt("customer_id");
    System.out.println(customerId);
}

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