CREATE TABLE table_train_9 ("id" NUMBER, "pregnancy_or_lactation" BOOLEAN, "intention_to_arterial_catheter" BOOLEAN, "intention_to_central_venous_catheter" BOOLEAN, "surgery" BOOLEAN, "hypotension" BOOLEAN, "chest_trauma" BOOLEAN, "burn_injury" NUMBER, "impossible_transthoracic_echocardiogram_tte" BOOLEAN, "NOUSE" FLOAT)

known pregnancy
SELECT * FROM table_train_9 WHERE pregnancy_or_lactation = 1
SELECT * FROM "table_train_9" WHERE "pregnancy_or_lactation" = 1