Show different publishers together with the number of publications they have.
SELECT Publisher ,  COUNT(*) FROM publication GROUP BY Publisher
SELECT Publisher ,  COUNT(*) FROM publication GROUP BY Publisher
[{'Publisher': 'Bertelsmann', 'COUNT(*)': 1}, {'Publisher': 'Pearson', 'COUNT(*)': 2}, {'Publisher': 'Springer Nature', 'COUNT(*)': 1}, {'Publisher': 'Thomson Reuters', 'COUNT(*)': 1}, {'Publisher': 'Wiley', 'COUNT(*)': 2}]