CREATE TABLE table_train_237 ("id" NUMBER, "fasting_c_peptide" FLOAT, "fasting_plasma_glucose" NUMBER, "smoking" BOOLEAN, "body_mass_index_bmi" FLOAT, "serum_25_oh_d_levels" NUMBER, "NOUSE" FLOAT)

fasting c _ peptide < 0.2 ng / ml;
SELECT * FROM table_train_237 WHERE fasting_c_peptide < 0.2
SELECT * FROM "table_train_237" WHERE "fasting_c_peptide" < 0.2