Basic knowledge of Oracle database

I. what is a relational database

At the beginning of learning the Oracle database, let's take a look at it. What is a relational database.

Relational database is a database relational system (Relational DataBase Management System) based on relational database model, referred to as RDBMS.

Second, relational database contains three core concepts, relational attribute fields.

A table in which the relationship consists of rows and columns, the properties are the columns in the table, and the field is a collection of column values. Obviously represents the basic data structure of the relational model.

Founder of relational data model

For those of us who study Oracle database, we have to get to know this big guy-- Cod, who is also the winner of the Turing Award for computer Science.

In June 1970, Coder, then a researcher at IBM, published a famous paper "Relational Model of large shared databases" on Communications ACM, which was the prelude to the revolution of relational database software.

III. The origin of the naming of Oracle

In 1983, in order to highlight their core product brands, Ellsion and Miner named the project code originally funded by the CIA Oracle, which means "oracle and language" in the dictionary.