SELECT Meno, Procento=cast(Count(*) * 100.0 / (Select count(*) from schema.Clovek) as decimal(18,2))
FROM Schema.Clovek
WHERE Meno='Jozef'
GROUP BY Meno
SELECT Meno, Procento=cast(Count(*) * 100.0 / (Select count(*) from schema.Clovek) as decimal(18,2))
FROM Schema.Clovek
WHERE Meno='Jozef'
GROUP BY Meno