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CREATE TABLE products (`id` int, `name` varchar(16), `company` varchar(3)) ; INSERT INTO products (`id`, `name`, `company`) VALUES (1, 'Product 1', 'AAA'), (2, 'Another product', 'BBB'), (3, 'One more product', 'CCC'), (4, 'Item ZZZ', 'BBB'), (5, 'Product A', 'AAA'), (6, 'Product uT', 'DDD'), (7, 'Product 2z', 'AAA') ;
select id, name, company from (select id, name, company , count(id) over(partition by company) cnt from products) t where cnt = 1;
id
name
company
3
One more product
CCC
6
Product uT
DDD