如何从postgresql select查询中获取age（）函数的年份

The following query returns:

以下查询返回:

SELECT AGE(cast(dob AS date)) 
FROM mas_patient_details;

age
----------
39 years 5 mons 19 days
13 years 2 days
69 years 2 days
41 years 11 mons 25 days
SELECT