CREATE TABLE table_name_18 (best_fit__all_data_ VARCHAR2, parameter VARCHAR2)

What is the best fit (all data) when the parameter shows fluctuation amplitude at 8h 1 mpc?
SELECT best_fit__all_data_ FROM table_name_18 WHERE parameter = "fluctuation amplitude at 8h −1 mpc"
SELECT "best_fit__all_data_" FROM "table_name_18" WHERE "fluctuation amplitude at 8h −1 mpc" = "parameter"