Post #1043

#SQL#PostgreSQL Window functions haqida eshitganmisiz? Quyidagi documentation bilan tanishib chiqing. https://www.postgresql.org/docs/current/tutorial-window.html https://www.postgresql.org/docs/current/functions-window.html Amaliyot uchun product-price-at-a-given-date masalasini window function ishlatib yechib ko'ring. @it_suhbat