mysqlm

SELECT * FROM customers;
select * from customers where country = "Japan";
select * from orderdetails where priceEach between 99 and 100;
select * from customers where contactLastName like 'A%';


-- Tạo bảng tạm với LIMIT để chứa customerNumber của 3 bản ghi đầu tiên
CREATE TEMPORARY TABLE temp_customer_numbers AS
    SELECT customerNumber
    FROM customers
    LIMIT 3;

SELECT *
FROM customers
WHERE customerNumber NOT IN (
    SELECT customerNumber
    FROM temp_customer_numbers
);

SELECT customerNumber, MAX(tong) as max_tong
FROM (
    SELECT customerNumber, SUM(amount) as tong
    FROM payments
    GROUP BY customerNumber
) AS subquery
GROUP BY customerNumber
ORDER BY max_tong DESC
LIMIT 1;