-- SQL -- Description: -- 1. Select the name and maximum balance for each payment system -- Input data:

To select the name and maximum balance for each payment system, you can use an SQL query with grouping and the MAX aggregate function.

Example query:

SELECT payment_system_name, MAX(balance) AS max_balance
FROM payments
GROUP BY payment_system_name;

Here:

• payment_system_name — the name of the payment system
• balance — the balance for which to find the maximum
• payments — the table with data

The query groups records by payment system and selects the maximum balance for each.