LeetCode 3220: Odd and Even Transactions Solution

Master LeetCode problem 3220 (Odd and Even Transactions), a medium 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.

3220. Odd and Even Transactions

Medium

Database

Problem Explanation

Explanation:

To solve this problem, we need to calculate the sum of amounts for odd and even transactions for each day. We can achieve this by using a SQL query that groups the transactions by date, calculates the sums for odd and even transactions separately, and then displays the results in the desired format.

Here are the steps of the algorithm:

Group the transactions by transaction_date.
Calculate the sum of amounts for odd transactions by filtering transactions with odd transaction_id.
Calculate the sum of amounts for even transactions by filtering transactions with even transaction_id.
Use the SQL COALESCE function to display 0 for days where there are no odd or even transactions.
Order the results by transaction_date in ascending order.

The time complexity of this algorithm is O(n), where n is the number of transactions in the table. The space complexity is O(1) as we are not using any additional data structures.

Solution Code

# Write your Java solution here
SELECT 
    t.transaction_date,
    COALESCE(
        SUM(CASE WHEN t.transaction_id % 2 != 0 THEN t.amount ELSE 0 END), 0) AS odd_sum,
    COALESCE(
        SUM(CASE WHEN t.transaction_id % 2 = 0 THEN t.amount ELSE 0 END), 0) AS even_sum
FROM transactions t
GROUP BY t.transaction_date
ORDER BY t.transaction_date;

Try It Yourself

Loading code editor...

Frequently Asked Questions

How to solve LeetCode 3220 (Odd and Even Transactions)?

This page provides optimized solutions for LeetCode problem 3220 (Odd and Even Transactions) in Java, C++, and Python, along with a detailed explanation and an interactive code editor to test your code.

What is the time complexity of LeetCode 3220 (Odd and Even Transactions)?

The time complexity for LeetCode 3220 (Odd and Even Transactions) varies by solution. Check the detailed explanation section for specific complexities in Java, C++, and Python implementations.

Can I run code for LeetCode 3220 on DevExCode?

Yes, DevExCode provides an interactive code editor where you can write, test, and run your code for LeetCode 3220 in Java, C++, or Python.

Back to LeetCode Solutions