Table: golf_stats_15
Columns: year
championship
winning_score
margin
runner_s_up

Question: What is the margin at the Nabisco Championship?
SQL: SELECT "margin" FROM golf_stats_15 WHERE "championship" = 'nabisco championship'

Question: What was the margin in 2001 at the McDonald's LPGA Championship?
SQL: SELECT "margin" FROM golf_stats_15 WHERE "year" = 2001 AND "championship" = 'mcdonald''s lpga championship'