How many countries have a latest population census in 2011? Indicate their full names.
have a latest population census in 2011 refers to LatestPopulationCensus = '2011'; full name refers to LongName
SELECT COUNT(LongName) FROM country WHERE LatestPopulationCensus = '2011' UNION ALL SELECT LongName FROM country WHERE LatestPopulationCensus = '2011'