I have a table names 'scoredata' having fields id, lessonid, levelid, studentid, addedate in which score for each day will be entered by the admin. I want to select only those studentid whose score has not been added from last four weeks. How can I do this in a single query.
Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. It's 100% free, no registration required.
Here's how it works:
- Anybody can ask a question
- Anybody can answer
- The best answers are voted up and rise to the top
Make sure you index
Give it a Try !!!