获取并删除给定哈希键的一个或多个字段的值。当最后一个字段被删除时，该键也将被删除。

*示例

redis> HSET mykey field1 "Hello" field2 "World" field3 "!"
(integer) 3
redis> HGETALL mykey
1) "field1"
2) "Hello"
3) "field2"
4) "World"
5) "field3"
6) "!"
redis> HGETDEL mykey FIELDS 2 field3 field4
1) "!"
2) (nil)
redis> HGETALL mykey
1) "field1"
2) "Hello"
3) "field2"
4) "World"
redis> HGETDEL mykey FIELDS 2 field1 field2
1) "Hello"
2) "World"
redis> KEYS *
(empty array)

*返回信息