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IshaSQL

Foundations Track · Easy · 15 min

Odd and Even Transactions

Table: transactions +------------------+------+ | Column Name | Type | +------------------+------+ | transaction_id | int | | amount | int | | transaction_da...

Foundations Track
Easy
15 min
aggregation
filtering

Company labels are directional practice context, not official interview guidance.

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Objective

Practice aggregation through a IshaSQL-tagged business scenario.

Approach

Use this track to lock in clean query structure, basic filtering logic, and confidence with grouped output.

Company context

Company labels are directional practice context, not official interview guidance.

Prereq: query basics
Prereq: filtering

Table: transactions +------------------+------+ | Column Name | Type | +------------------+------+ | transaction_id | int | | amount | int | | transaction_date | date | +------------------+------+ The transactions_id column uniquely identifies each row in this table. Each row of this table contains the transaction id, amount and transaction date. Write a solution to find the sum of amounts for odd and even transactions for each day. If there are no odd or even transactions for a specific date, display as 0 . Return the result table ordered by transaction_date in ascending order . The result format is in the following example. Example: Input: transactions table: +----------------+--------+------------------+ | transaction_id | amount | transaction_date | +----------------+--------+------------------+ | 1 | 150 | 2024-07-01 | | 2 | 200 | 2024-07-01 | | 3 | 75 | 2024-07-01 | | 4 | 300 | 2024-07-02 | | 5 | 50 | 2024-07-02 | | 6 | 120 | 2024-07-03 | +----------------+--------+------------------+ Output: +------------------+---------+----------+ | transaction_date | odd_sum | even_sum | +------------------+---------+----------+ | 2024-07-01 | 75 | 350 | | 2024-07-02 | 0 | 350 | | 2024-07-03 | 0 | 120 | +------------------+---------+----------+ Explanation: For transaction dates: 2024-07-01: Sum of amounts for odd transactions: 75 Sum of amounts for even transactions: 150 + 200 = 350 2024-07-02: Sum of amounts for odd transactions: 0 Sum of amounts for even transactions: 300 + 50 = 350 2024-07-03: Sum of amounts for odd transactions: 0 Sum of amounts for even transactions: 120 Note: The output table is ordered by transaction_date in ascending order.

transactions
transaction_id INT PRIMARY KEY
amount INT
transaction_date DATE
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