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 hnrq.cs.duke.edu/ratest, you agree to use our debugging tool, RATest (hnrq.cs.duke.edu/ratest), for relational database queries.
You will be able to learn relational algebra queries using the tool by writing relational algebra queries on hnrq.cs.duke.edu/ratest. 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 can choose whether to authorize us to record your submission records
We will protect the confidentiality of your submission records by anonymizing your id in the resulting dataset.
If you have questions about this project, please contact Zhengjie Miao (email@example.com), faculty advisors Jun Yang (firstname.lastname@example.org), Sudeepa Roy (email@example.com), and Kristin Stephens-Martinez (firstname.lastname@example.org).