从SQL表中减去当前年份

Question

如何从表中减去当前年份。

我有一个包含列VehicleYear的表格。因此，我只需从VehicleYear中减去当前年份即可获得VehicleAge。

我尝试了以下查询，但由于SYSDATE似乎反映了添加行的日期，因此无效。

SELECT V. VEHICLENAME, (SYSDATE - V.VEHICLEYEAR) AS CURRENTAGE
FROM VEHICLE V

Answer 1

您可以运行此查询以从两个日期中减去年份

SELECT VEHICLENAME, 
       EXTRACT(YEAR FROM sysdate) - EXTRACT(YEAR FROM VehicleYear) AS CURRENTAGE
FROM VEHICLE;

SQL Fiddle DEMO