CREATE TABLE customers (
    id INT PRIMARY KEY NOT ENFORCED,
    name STRING,
    country STRING,
    zip STRING
);
INSERT INTO
    customers
VALUES
    (1, 'zs', 'ch', '123'),(2, 'ls', 'ch', '456'),(3, 'ww', 'ch', '789');

CREATE TEMPORARY TABLE Orders (
        order_id INT,
        total INT,
        customer_id INT,
        proc_time AS PROCTIME()
    ) WITH (
        'connector' = 'datagen',
        'rows-per-second' = '1',
        'fields.order_id.kind' = 'sequence',
        'fields.order_id.start' = '1',
        'fields.order_id.end' = '100000',
        'fields.total.kind' = 'random',
        'fields.total.min' = '1',
        'fields.total.max' = '1000',
        'fields.customer_id.kind' = 'random',
        'fields.customer_id.min' = '1',
        'fields.customer_id.max' = '3'
    );
    
SELECT
    o.order_id,
    o.total,
    c.country,
    c.zip
FROM
    Orders AS o
JOIN customers 
FOR SYSTEM_TIME AS OF o.proc_time AS c 
ON o.customer_id = c.id;