1INSERT INTO table_name(c1)
2VALUES(c1)
3ON DUPLICATE KEY UPDATE c1 = VALUES(c1) + 1;
1merged.loc[merged['state/region'] == 'PR', 'state'] = 'Puerto Rico'
2merged.loc[merged['state/region'] == 'USA', 'state'] = 'United States'
3merged.isnull().any()
4