Table: race_results_78
Columns: year
entrant
chassis
engine
points

Question: What points larger than 1950 has a maserati straight-6 engine?
SQL: SELECT "points" FROM race_results_78 WHERE "year" > 1950 AND "engine" = 'maserati straight-6'

Question: What is the chassis for a 1952 officine alfieri maserati with an entrant?
SQL: SELECT "chassis" FROM race_results_78 WHERE "entrant" = 'officine alfieri maserati' AND "year" = 1952

Question: What type of engine does a 1951 alfa romeo 159m chasis have?
SQL: SELECT "engine" FROM race_results_78 WHERE "year" = 1951 AND "chassis" = 'alfa romeo 159m'

Question: What Entrant has a 1952 maserati straight-6 engine?
SQL: SELECT "entrant" FROM race_results_78 WHERE "engine" = 'maserati straight-6' AND "year" = 1952

Question: What Entrant older than 1950 has points smaller than 7?
SQL: SELECT "entrant" FROM race_results_78 WHERE "year" > 1950 AND "points" < 7

Question: What is the total points that an 1951 Entrant alfa romeo spa have?
SQL: SELECT SUM("points") FROM race_results_78 WHERE "entrant" = 'alfa romeo spa' AND "year" < 1951