Show all template type codes and number of templates for each.
SELECT template_type_code ,  count(*) FROM Templates GROUP BY template_type_code
SELECT template_type_code ,  count(*) FROM Templates GROUP BY template_type_code
[{'Template_Type_Code': 'AD', 'count(*)': 3}, {'Template_Type_Code': 'BK', 'count(*)': 6}, {'Template_Type_Code': 'CV', 'count(*)': 2}, {'Template_Type_Code': 'PP', 'count(*)': 6}, {'Template_Type_Code': 'PPT', 'count(*)': 3}]