schemaA PostgreSQL database cluster contains one or more named databases. Roles and a few other object types are shared across the entire cluster. A client connection to the server can only access data in a single database, the one specified in the connection request.Users of a cluster do not necessarily have the privilege to access every database in the cluster. Sharing of role names means that there cannot be different roles named, say,joein two databases in the same cluster; but the system can be configured to allowjoeaccess to only some of the databases.When a new database is created, Post
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