Feedback for database sample

[natashadsilva]

Db2-Streams-NamedTuple.zip
Hi,
I ran the database notebook and I was very pleased to see the new support for DB2 Connections right in the notebook!! Very easy to use!

Couple of comments:

• I was using a table with a lot of columns and I found using the Streams schema was not needed if I could use a named tuple. This is a better option, especially because the sample was created for someone who is not familiar with Streams at all.
  I attached my code, it is an example to use named tuples in the Database notebook to make it even easier to understand/reuse.

• The options for connecting to DB2 (section 1.3.x) were not clear. It is not stated that you should follow just one of the sections and not all three of them.

• Also needs to be clarified that option 1 is for CPD project, option 2 is for CPDaaS.(the former watson studio)

• I'm not sure what is meant by custom database connection - does it mean a database that the CPD connections tool does not support?
  Thank you!

[markheger]

I suggest to have the Db2-Streams-NamedTuple.ipynb in addition to the existing database sample notebook.

Comments to the connection options are added with PR #72