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Question: What is the compression ratio when the continuous power is  hp (kW) at 2,200 RPM and the critical altitude is at sea level?
Columns: ['Engine', 'Power, continuous', 'Critical altitude This is the highest altitude at which the engine can achieve its full continuous power rating. Above this altitude, power falls off with height as with a naturally aspirated engine . See Supercharger#Altitude effects for details.', 'Power, takeoff', 'Compression ratio', 'Supercharger gear ratio', 'Octane rating', 'Dry weight']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Wasp Jr. A', 'hp (kW) at 2,000 RPM', 'sea level', 'same', '5.0:1', '7:1', '68', 'lb (kg)']
SQL:

assistant: SELECT COUNT("Compression ratio") FROM "Table" WHERE "Power, continuous" = 'hp (kW) at 2,200 RPM' AND "Critical altitude This is the highest altitude at which the engine can achieve its full continuous power rating. Above this altitude, power falls off with height as with a naturally aspirated engine . See Supercharger#Altitude effects for details." = 'sea level';