It has been so long since my DB course, all I know is that they use B-Trees to store data
I'm gonna attempt to write my own DB anyway
## File format
### Train of thought
As far as I'm concerned, the most important thing is probably the way the database gets stored. I don't want it to be in memory so I will have to create a file (or more) on the filesystem in which all the data is going to be stored.
As far as I know, sqlite stores databases in a single file, I'm not sure about others like postgresql, mysql/mariadb, oracledb, etc.
Maybe having a file per table instead of per database is easier to set up, but it might be just as hard, and doing IO on multiple files might be bad for performance.
