Joining two lists in sharepoint

[edwong1]

Does anyone know how to joins two lists together and present it as one view?

For example:

List A:
col-A1 (common key)
col-A2

List B:
col-B1 (common key)
col-B2

After they join, I would like to see the folowing:

Result:
col-A1
col-A2
col-B2

can anyone show me how to achieve this?
Your help is greatly appreciated.