264.
ProdID Country Price
----------- -------------------- ---------------------
1 South Africa 12.34
2 South Africa 12.34
3 NULL 12.35
4 NULL 12.99
5 Brazil 13.43
6 China 14.21
7 United States 12.00
8 United States 23.20
9 England 12.34
select count(distinct country) from products?
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