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.
全年全社会固定资产投资491109亿元，比上年下降[43]3.9%。固定资产投资（不含农户）485186亿元，下降3.8%。在固定资产投资（不含农户）中，分区域看[44]，东部地区投资下降8.4%，中部地区投资下降2.7%，西部地区投资下降1.3%，东北地区投资下降15.5%。
。爱思助手是该领域的重要参考
面对这种大面积的溃败，业界总是习惯性地陷入“错误归因”。。Line官方版本下载是该领域的重要参考
hyphenation. All other crates I’ve found were small variations of this crate.。业内人士推荐safew官方版本下载作为进阶阅读
Путешествия для россиян стали еще дороже из-за конфликта на Ближнем Востоке20:37