CREATE TABLE table_train_215 ("id" NUMBER, "hemoglobin_a1c_hba1c" FLOAT, "hgba1c" FLOAT, "estimated_glomerular_filtration_rate_egfr" NUMBER, "kidney_disease" BOOLEAN, "body_mass_index_bmi" FLOAT, "age" FLOAT, "NOUSE" FLOAT)

have a bmi of less than the 90 percentile for age.
SELECT * FROM table_train_215 WHERE body_mass_index_bmi < 90
SELECT * FROM "table_train_215" WHERE "body_mass_index_bmi" < 90