Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Discuss the meaning of "relational". #367

Open
wants to merge 2 commits into
base: main
Choose a base branch
from
Open

Discuss the meaning of "relational". #367

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
46a6e01
Discuss the concept of relational.
jd-foster Oct 12, 2023
aa4aa2e
Move explanatory text outside definition.
jd-foster Oct 12, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 6 additions & 1 deletion episodes/00-sql-introduction.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -112,9 +112,14 @@ which is stored as one of its fields.
Records may also contain keys that refer to records in other tables,
which enables us to combine information from two or more sources.


::::::::::::::::::::::::::::::::::::::::::::::::::

The *relational* concept is connected with organizing information across multiple tables in the database.
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

The phrase "is connected with" feels vague, and I'm not sure that this sentence adds anything beyond what's in 118. I'd consider omitting it.

The *relationships* between tables in a database can be established (or even enforced) in different ways, through the use of keys and other constraints.
In many small datasets we have only a few tables and we don't have to think about cross-references within datasets.
The idea of *relational data* becomes more and more important as the amount and complexity of data grows. This provides the motivation for using relational databases: to organize data through related keys.
Comment on lines +119 to +120
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

This is getting into the rationale for using relational databases--would it make sense to put these lines under "Why use relational databases" below?



## Databases

### Why use relational databases
Expand Down