ON products USING GIN ((data-'tags')) - extracts value by 'tags' key as JSON(B) and uses GIN to index it, since it is a composite type; it allows using various containment and existence operators for this particular part of the JSON document
for calculating various collection stats by batches of ids, Mongo outcompetes Postgres on larger documents but loses on smaller ones
，更多细节参见safew官方版本下载
«В Лос-Анджелесе есть огромная проблема с чистотой воздуха. (...) Вот эти частицы, которые летают в атмосфере, плюс особенность климата, и здесь такая дымка скапливается», — отметила блогерша.，更多细节参见heLLoword翻译官方下载
Amazon's Spring Sale may not be quite as big as Prime Day in July or October, but it's still one of Amazon's biggest sales of the year. Far more than spring-themed items are on sale, though outdoor equipment, fitness gear, mattresses and lightweight bedding, robot vacuums, and anything else that screams "spring reset" is a huge focus. You'll likely also find deals on tech like TVs, noise-cancelling headphones, and of course, Kindles and other Amazon devices.
memory space called pages.