Question: Which Year has a Category of Best Performance by a Leading Actress in a Musical?
SQL: SELECT MAX("Year") FROM "2-1794747-4" WHERE "Category" = 'Best Performance by a Leading Actress in a Musical';

Question: Which Award Ceremony has a Result of Nominated, and a Category of Best Revival of a Musical?
SQL: SELECT "Award Ceremony" FROM "2-1794747-4" WHERE "Result" = 'Nominated' AND "Category" = 'Best Revival of a Musical';