CREATE TABLE table_train_203 ("id" INT, "gender" TEXT, "perforation" BOOLEAN, "hemoglobin_a1c_hba1c" FLOAT, "peptic_ulcer_disease" BOOLEAN, "serum_c_peptide" FLOAT, "gastrointestinal_disease" BOOLEAN, "serum_creatinine" FLOAT, "age" FLOAT, "NOUSE" FLOAT)

serum c _ peptide level < 0.6 ng / ml
SELECT * FROM table_train_203 WHERE serum_c_peptide < 0.6
SELECT * FROM "table_train_203" WHERE "serum_c_peptide" < 0.6