About rpm database

["Chowdhury, Chandan Dutta" <chandan-dutta chowdhury hp com>]

Hello All,

I have 2 questions for you

1. Can any one point me to a document describing the structure of RPM
database?  
This what all tables are present in the RPM database, what all columns
in them.

2. Is there a CLI for doing SQL queries on the RPM db, if so plz provide
me the link where I can find them.



Thanks and regards
Chandan