Problem
Writing efficient SQL queries for DB2 can be tricky. Some general SQL guidelines apply, and there are also specific practices that apply only to DB2.
Solution
Here is a list of tips you can use to write good queries:
- Avoid in your queries. Instead, state the columns you want to select.
- Use the consistent acronyms to alias your table names (makes it easier to read joins)
- Use to limit the results set
- Use or instead of