Table: vario_bahn_details
Columns: system
owner
quantity
delivery
length
gauge
operation
seats
standing

Question: How many seats have a quantity over 45?
SQL: SELECT SUM("seats") FROM vario_bahn_details WHERE "quantity" > 45

Question: Which owner has 84 seats?
SQL: SELECT "owner" FROM vario_bahn_details WHERE "seats" = 84

Question: Which deliver has 16 and a standing more than 128?
SQL: SELECT "delivery" FROM vario_bahn_details WHERE "quantity" = 16 AND "standing" > 128