CRUD的定义

Create, read, update and delete (CRUD) are the four basic functions of persistent storage, a major part of nearly all computer software. Sometimes CRUD is expanded with the words retrieve instead of read or destroy instead of delete. It is also sometimes used to describe user interface conventions that facilitate viewing, searching, and changing information; often using computer-based forms and reports.

from:http://en.wikipedia.org/wiki/Create,_read,_update_and_delete

CRUD其实就是增删改查的英文缩写。

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