Question: What is the type if quantity rebuilt is more than 2 and the railway number is 4"…150?
SQL: SELECT "Type" FROM "2-18934662-7" WHERE "Quantity rebuilt" > 2.0 AND "Railway number(s)" = '4"…150';

Question: What was the Rebuildjahr(e) for the T2aa class?
SQL: SELECT "Rebuildjahr(e)" FROM "2-18934662-7" WHERE "Class" = 'T2aa';

Question: What is the total of quantity rebuilt if the type is 1b n2t and the railway number is 88, 118?
SQL: SELECT COUNT("Quantity rebuilt") FROM "2-18934662-7" WHERE "Type" = '1b n2t' AND "Railway number(s)" = '88, 118';