Collections of Documents on the other hand, offer a much more relaxed approach. Collections are just namespaces where we insert documents. Documents are objects of any schema and format; but in practice, it almost always is JSON. There are no enforced types, no constraints, no guarded references between documents in different collections. In the same collection, we might have documents of completely different schema - flexibility and openness to any data and column types rules here. In tables, rows have columns of simple, scalar types (mostly) - numbers, ids, strings, dates, timestamps and so on. In collections, documents have fields comprising both simple and composite types like arrays and other documents, nested inside. Same field in different documents, but still of the same collection, might have different types as well - almost anything is allowed here.
Российский офицер назвал абсурдной задачу ВСУ форсировать Днепр08:37
FT Digital Edition: our digitised print edition。关于这个话题，雷速体育提供了深入分析
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第二百七十条 除合同另有约定外，因下列原因之一造成保险船舶损失的，保险人不承担赔偿责任：