CREATE TABLE table_train_220 ("id" NUMBER, "hemoglobin_a1c_hba1c" FLOAT, "renal_disease" BOOLEAN, "creatinine_clearance_cl" FLOAT, "fasting_plasma_glucose" NUMBER, "hba1c" FLOAT, "serum_creatinine" FLOAT, "body_mass_index_bmi" FLOAT, "NOUSE" FLOAT)

serum creatinine < 1.8 mg / dl
SELECT * FROM table_train_220 WHERE serum_creatinine < 1.8
SELECT * FROM "table_train_220" WHERE "serum_creatinine" < 1.8