深入浅出Redis03使用Redis数据库(hashes类型)

2.hsetnx

   设置hash field为指定值，如果key不存在，则先创建。如果存在返回0.

redis 127.0.0.1:6379> hsetnx user:001 name wangwu
(integer) 0
redis 127.0.0.1:6379> hget user:001 name
"lisi"

3,hmset

   同时设置 hash的多个field

redis 127.0.0.1:6379> hmset myhash field1 hello field2 world
OK
redis 127.0.0.1:6379> hget myhash field1
"hello"
redis 127.0.0.1:6379> hget myhash field2
"world"
redis 127.0.0.1:6379>

4 hget

  获取指定的hash field

5. hmget

   获取全部指定的hash field

redis 127.0.0.1:6379> hmset myhash field1 hello field2 world
OK
redis 127.0.0.1:6379> hget myhash field1
"hello"
redis 127.0.0.1:6379> hget myhash field2
"world"
redis 127.0.0.1:6379> hmget myhash field1 field2
1) "hello"
2) "world"

6.  hincrby

    指定hash field加上给定值。

redis 127.0.0.1:6379> hset myhash age 1
(integer) 1
redis 127.0.0.1:6379> hget myhash age
"1"
redis 127.0.0.1:6379> hincrby myhash age 8
(integer) 9
redis 127.0.0.1:6379> hget myhash age
"9"

7. hexists

   测试指定的field是否存在。

redis 127.0.0.1:6379> hexists myhash age
(integer) 1

8 hlen

   返回指定hash的field数量

redis 127.0.0.1:6379> hlen myhash
(integer) 3

9. hdel

  删除指定hash的field

redis 127.0.0.1:6379> hdel myhash field1
(integer) 1

10. hkeys

  返回hash的所有field

redis 127.0.0.1:6379> hkeys myhash
1) "field2"
2) "age"

11. hgetall

  获取某个hash中全部的 field及value.

redis 127.0.0.1:6379> hgetall myhash
1) "field2"
2) "world"
3) "age"
4) "9"

深入浅出Redis03使用Redis数据库(hashes类型)

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