如下表，表名为aaa：
+----+--------+--------+--------------+
| id | nodeId | type | domain |
+----+--------+--------+--------------+
| 1 | vlsr1 | type1 | blue |
| 2 | vlsr2 | type2 | red |
+----+--------+--------+--------------+
想要更改blue为yellow，则使用如下语法：
update aaa set domain='yellow' where id='1';
即可完成修改