Well, MongoDB was designed and created as a document database first and foremost, not an SQL one (NoSQL). It is focused and optimized for this particular use case and a way of storing and accessing data. PostgreSQL on the other hand, is a relational, SQL database that later on added support for composite column types like JSON/JSONB, ARRAY and others. Over the years, it has extended and optimized storing JSON documents in its own binary JSONB format, as well as added more ways to index, query and modify data of this type.
要找准问题，离不开扎实的调研。民革中央与地方民革组织联动开展重点调研，在浙江，调研团队实地走访企业68家，召开12场座谈会。为进一步提升提案的科学性，民革中央经济委员会还专门会同民革上海市委会进行研究论证，邀请上海社科院、上海市政府发展研究中心的专家把脉问诊。最终，民革中央在提案中提出：中小企业转型难，难在智造服务供给各自为战，系统性集成性缺失；难在智造服务需求存在认知偏差，转型自主积极性严重不足；难在智造服务政策侧重抓大放小，针对智造服务领域中独角兽和瞪羚企业的精准支持尚显缺位。
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