Modifying Data in SQL: interview exercises
Modifying Data in SQL: 5 test-checked interview exercises (INSERT a row, UPDATE some rows), each beside a worked example, with tests as you go. Free.
- INSERT a row
- UPDATE some rows
- DELETE in the right order
- Insert or update (UPSERT)
- INSERT from a SELECT
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Progress is saved in your browser, and in your account if you sign in.