我试图获取“ SERIAL8”字段的最后四位数字,并将其放在一个名为“ SS4”的新字段中。这是我要使用的查询,但它不起作用。我是新来的,因此不胜感激
SELECT * FROM CUSTOMER_TABLE
SUBSTRING (SERIAL,4,4) as 'SS4'
CUSTOMER_TABLE
+-----------------------+------------+----------+--+
| "Complaint Full Date" | Source | SERIAL | |
+-----------------------+------------+----------+--+
| 02/04/16 | DAPIS_CAIR | DG540732 | |
| 04/18/16 | DAPIS_CAIR | DG553384 | |
| 03/23/17 | RO | DG559515 | |
| 03/29/16 | CAIR | DG559781 | |
| 12/10/14 | DAPIS_CAIR | DG561621 | |
+-----------------------+------------+----------+--+