Using sum(), count(), and "group by" in Berkeley DB

Ho开发者_如何转开发w do I use sum(), count(), and group by in Berkeley DB? Is there any alternative way?

---

Which API are you using? If you're using the key/value API, then you will need to implement those functions yourself, essentially by scanning the database using a cursor. If you are using the SQL API, then you can simply do a "SELECT sum(), count() ... GROUP BY ..." SQL statement.

You may want to post questions like this to the Berkeley DB forum.