SQL Primer 4+
Relational Algebra
Dr. Ralph Heider
Designed for iPad
-
- Free
Screenshots
Description
A very first insight into the database theory on your iPhone, iPad or iPod touch.
1970 E.F. Codd has started a revolution with his paper 'A relational model of data for large shared data banks, Communications of the ACM, Volume 13, Issue 6 (June 1970)' that finally led to the today's omnipresent database query language SQL.
This little app shows some primitive and derived operations with the following information:
* SQL92 and SQL86/89 sample queries,
* the results of the queries and
* appropriate descriptions.
Furthermore the SQL test script that has been used for the calculation of the samples can be displayed.
The app is interesting for the first contact with the database subject and for all who are using SQL86/89 queries for over two decades now and finally want to change to SQL92 also ;)
What’s New
Version 3.0
• Supports new screen sizes
• Updated design (UI, Graphics, etc.)
• Dark Mode support
• Support for Spotlight search
• Supports multiple windows (iPadOS)
Ratings and Reviews
Is what it says, elementary
Elementary SQL, very elementary. If you've written SQL on the job anywhere chances are this will teach you little to nothing. It's very bland though but is focused on simple presentation. If your learning or taking a class, the visuals are nice for things like outer joins. Good start!
request
firmware 3.1.2 version support please.
Exactly what I was looking for
Simple, very very simple my only complaint is theres not enough content to really justify the app but I still like it
App Privacy
The developer, Dr. Ralph Heider, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Information
- Seller
- Dr. Ralph Heider
- Size
- 34 MB
- Category
- Education
- Compatibility
-
- iPhone
- Requires iOS 13.4 or later.
- iPad
- Requires iPadOS 13.4 or later.
- iPod touch
- Requires iOS 13.4 or later.
- Mac
- Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
- Languages
-
English, German
- Age Rating
- 4+
- Copyright
- © Kay Heider, Dr. Ralph Heider
- Price
- Free