The main changes are:
Since Mongo is a NoSQL database, it has its own JavaScript-like query language to work with data. As Postgres is an SQL database, it needed to adopt SQL to allow for working with JSON data - it has its own rich set of JSON functions and operators. Let's compare two contenders by going through lots of practical examples.
，这一点在91视频中也有详细论述
Green: Be adjacent to
Can be obtained with: