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.
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周六上午最先發表聲明的是以色列國防部長，他表示以色列已「對伊朗發動先發制人打擊，以消除威脅」，並警告以色列民眾準備應對報復性的導彈及無人機攻擊。
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因救助方的过失未能防止或者减少生态环境损害的，可以全部或者部分剥夺救助方获得特别补偿的权利。