insert into catalog(product_id, product_name, stock, unit_price)
    values('CATALOG-001','Berlin',100,1500);

insert into catalog(product_id, product_name, stock, unit_price)
    values('CATALOG-002','Tokyo',100,1000);

insert into catalog(product_id, product_name, stock, unit_price)
    values('CATALOG-003','Stockholm',120,2000);
