What is mysql-server?
mysql-server represents the server, which is the server; it is the mysql core program that generates management database instances, database instance task scheduling threads, etc., and provides related interfaces for different clients to call.
mysql-server is used to persist data and provide a query interface (SQL) for it; it can host multiple databases and process queries on these databases.
Server is an integration of DBMS that is oriented to the physical level and includes a series of mechanisms and processing methods for storing data. SQL statements can be translated into operations on memory and files. In other words, the server directly operates files.
Example:
mysql-server is similar to a general application installed by QQ Company on their own company's server.
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