Writing an AND query requires a different approach than what we used for our OR query. If you wanted to perform the analogue of a SQL query with multiple values in a WHERE clause, you'd need to structure your view keys in such a way as to allow your application to supply multiple values as one key parameter value:

SELECT * 
FROM Users 
WHERE LastName = 'Soprano' AND FirstName = 'Tony'

In the preceding SQL statement, we are able to have values for both LastName and FirstName. One approach would be to create a delimited key in our index like this:

function(doc, meta) {
  if (doc.type == "user" && doc.firstName && doc.lastName) {
    emit(doc.lastName + "," + doc.firstName, null);
  }
}

This map function emits a key in the form of "Soprano,Tony" to the index. When querying the index, the client application would concatenate the last name, a comma, and the first name. The resulting string would be provided as the argument for the key parameter.

Obviously, it's not...