In computing, CRUD is an acronym for create, retrieve, update, and delete.It is used to refer to the basic functions of a database or persistence layer in a software system.

• 在从事计算机工作中，CRUD 是Create,Retrieve,Update,Delete这几个单词的首写字母，用来代指数据库的基本增删改查操作或者一个软件系统中的持久层的基本操作。