CREATE TABLE table_45100 ("Date" CLOB, "Tournament" CLOB, "Winning score" CLOB, "Margin of victory" CLOB, "Runner ( s ) -up" CLOB)

What is Date, when Tournament, is Greenbrier Classic?
SELECT "Date" FROM table_45100 WHERE "Tournament" = 'greenbrier classic'
SELECT "Date" FROM "table_45100" WHERE "Tournament" = 'greenbrier classic'