Overview
I found very famous and useful youtube channel in Database field. It's name is [CMUDatabase](https://www.youtube.com/@CMUDatabaseGroup/playlists).It's a really useful channel for me, because I'm a DBA, so I need to study another DB.
From long time ago, I've wanted to learn lower level data structures, and many types of use case, pros and cons of Database.
I will steadily study the contents of this channel's video, especially the [advanced database systems](https://www.youtube.com/watch?v=LWS8LEQAUVc&list=PLSE8ODhjZXjYzlLMbX3cR0sxWnRM7CLFn), and make it mine.
01 History of Databases
Relational Database
The first lecture is about history of database.
[IMS](https://en.wikipedia.org/wiki/IBM_Information_Management_System) was the first commercial DataBase System. It operate on IBM designed computer called IMS, and starting in 1966 for Apollo program. IMS database stores data using a hierachical model.
Ted Codd was a mathematician working at IBM Research, He saw developers spending their time rewriting IMS and Codasyl program every time the database's schema or layout changed.
1969 paper of a Relational Data Model came out. 1970 Very Second paper came out "A Relational Model of Data for Large Shared Data Banks".
Relational Model Has three parts.
현재 단락 (1/8)
I found very famous and useful youtube channel in Database field. It's name is [CMUDatabase](https:/...