CREATE TABLE table_train_191 ("id" INT, "gender" TEXT, "hemoglobin_a1c_hba1c" FLOAT, "diabetic" TEXT, "serum_creatinine" FLOAT, "allergy_to_glyburide" BOOLEAN, "kidney_disease" BOOLEAN, "drug_abuse" BOOLEAN, "age" FLOAT, "NOUSE" FLOAT)

hba1c levels between 6 and 9.5 to be enrolled in the study.
SELECT * FROM table_train_191 WHERE hemoglobin_a1c_hba1c >= 6 AND hemoglobin_a1c_hba1c <= 9.5
SELECT * FROM "table_train_191" WHERE "hemoglobin_a1c_hba1c" <= 9.5 AND "hemoglobin_a1c_hba1c" >= 6