user: Question: what is the highest % hydropower when % coal is 4.9 and % nuclear power is more than 0?
Columns: ['Country', 'Electricity production (Kw/h, billion)', '% Coal', '% Natural gas', '% Oil', '% Hydropower', '% Other renewable', '% Nuclear power']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Albania', 4.2, 0.0, 0.0, 0.0, 100.0, 0.0, 0.0]
SQL:

assistant: SELECT MAX("% Hydropower") FROM "Table" WHERE "% Coal" = 4.9 AND "% Nuclear power" > 0.0;