CREATE TABLE table_test_21 ("id" INT, "gender" TEXT, "systolic_blood_pressure_sbp" INT, "tachycardia" INT, "body_weight" FLOAT, "renal_disease" BOOLEAN, "anaemia" BOOLEAN, "creatinine_clearance_cl" FLOAT, "estimated_glomerular_filtration_rate_egfr" INT, "cardiogenic_shock" BOOLEAN, "history_of_dialysis" BOOLEAN, "prior_creatinine" FLOAT, "severe_bradycardia" BOOLEAN, "diastolic_blood_pressure_dbp" INT, "hypotension" BOOLEAN, "heart_rate" INT, "serum_creatinine" FLOAT, "hb" FLOAT, "renal_transplantation" BOOLEAN, "hypertension" BOOLEAN, "age" FLOAT, "NOUSE" FLOAT)

male or female , aged 30 to 90 years
SELECT * FROM table_test_21 WHERE age >= 30 AND age <= 90 AND (gender = 'male' OR gender = 'female')
SELECT * FROM "table_test_21" WHERE "age" <= 90 AND "age" >= 30 AND ("gender" = 'female' OR "gender" = 'male')