Please refer to radb for the syntax of RA queries. Please do NOT use aggregation here.
RA Test Status:
Add a new practice query
INFORMATION SHEET AND DATA USE CONSENT
USAGE OF RATEST
By registering with ratest-demo.cs.duke.edu, you agree to use our debugging tool, RATest (ratest-demo.cs.duke.edu), for relational database queries.
You will be able to learn relational algebra queries using the tool by writing relational algebra queries on ratest-demo.cs.duke.edu. You will be provided with hints (a visualization of your query and a small input database example that shows how your query result differs from the expected answer) when the tool tells you that your query is wrong.
You agree to authorize us to record your submission records
We will protect the confidentiality of your submission records by anonymizing your id in the submission.
Information collected in RATest may be shared with other researchers, but we will not share any information that could identify you.
If you have questions about this project, please contact Zhengjie Miao (firstname.lastname@example.org), faculty advisors Jun Yang (email@example.com) and Sudeepa Roy (firstname.lastname@example.org).