Redis 的数据结构简介
1、redis 中的字符串
127.0.0.1:6379> set hello1 world OK 127.0.0.1:6379> get hello1 "world" 127.0.0.1:6379> del hello1 (integer) 1 127.0.0.1:6379> get hello1 (nil) 127.0.0.1:6379> type hello # 查看当前key的类型
myRedis:0>set views 0 # 设置浏览量 "OK" myRedis:0>get views "0" myRedis:0>incr views # 浏览量自增1 "1" myRedis:0>INCRBY views 1 # 设置浏览量自增10
"11"
myRedis:0>
2、redis中的列表
1 127.0.0.1:6379> rpush list-key item 2 (integer) 1 3 127.0.0.1:6379> rpush list-key item1 4 (integer) 2 5 127.0.0.1:6379> rpush list-key item2 6 (integer) 3 7 127.0.0.1:6379> rpush list-key item 8 (integer) 4 9 127.0.0.1:6379> get list-key 10 (error) WRONGTYPE Operation against a key holding the wrong kind of value 11 127.0.0.1:6379> lrange list-key 12 (error) ERR wrong number of arguments for 'lrange' command 13 127.0.0.1:6379> lrange list-key 0-1 14 (error) ERR wrong number of arguments for 'lrange' command 15 127.0.0.1:6379> lrange list-key 0 - 1 16 (error) ERR wrong number of arguments for 'lrange' command 17 127.0.0.1:6379> lrange list-key 0 -1 18 1) "item" 19 2) "item1" 20 3) "item2" 21 4) "item" 22 127.0.0.1:6379> lindex list-key 1 23 "item1" 24 127.0.0.1:6379> 25 127.0.0.1:6379> lpop list-key 26 "item" 27 127.0.0.1:6379> lrange list-key 0 -1 28 1) "item1" 29 2) "item2" 30 3) "item"
3、redis的集合（set）
注意：redis存储的集合是无序的
1 127.0.0.1:6379> sadd set-key item 2 (integer) 1 3 127.0.0.1:6379> sadd set-key item1 4 (integer) 1 5 127.0.0.1:6379> sadd set-key item2 6 (integer) 1 7 127.0.0.1:6379> sadd set-key item3 8 (integer) 1 9 127.0.0.1:6379> sadd set-key item 10 //1 表示元素已经添加到集合中 11 //0 表示元素已经存在在集合中
1 127.0.0.1:6379> smembers set-key 2 1) "item" 3 2) "item3" 4 3) "item1" 5 4) "item2" 6 //获取集合包含的所有元素
1 127.0.0.1:6379> sismember set-key item4 2 (integer) 0 3 127.0.0.1:6379> sismember set-key item 4 (integer) 1 5 //0 表示不存在 6 //1 表示存在
1 127.0.0.1:6379> srem set-key item3 2 (integer) 1 3 127.0.0.1:6379> srem set-key item3 4 (integer) 0 5 6 //使用srem 命令会返回被移除元素的数量
1 127.0.0.1:6379> smembers set-key 2 1) "item2" 3 2) "item" 4 3) "item1"
4、redis 的散列
1 127.0.0.1:6379> hset hash-key sub-key1 value1 2 (integer) 1 3 127.0.0.1:6379> hset hash-key sub-key2 value2 4 (integer) 1 5 127.0.0.1:6379> hset hash-key sub-key1 value2 6 (integer) 0 7 127.0.0.1:6379> hgetall hash-key 8 1) "sub-key1" 9 2) "value2" 10 3) "sub-key2" 11 4) "value2" 12 127.0.0.1:6379> hdel hash-key sub-key2 13 (integer) 1 14 127.0.0.1:6379> hdel hash-key sub-key2 15 (integer) 0 16 127.0.0.1:6379> hget hash-key sub-key1 17 "value2" 18 127.0.0.1:6379> hgetall hash-key 19 1) "sub-key1" 20 2) "value2" 21 127.0.0.1:6379> 22 //注意：key是唯一的，重复set 会覆盖之前的值
5、redis的有序集合
1 127.0.0.1:6379> zadd zset-key 728 membe1 2 (integer) 1 3 127.0.0.1:6379> zadd zset-key 899 member0 4 (integer) 1 5 127.0.0.1:6379> zadd zset-key 899 member0 6 (integer) 0 7 127.0.0.1:6379> zrange zset-key 0 -1e withsorces 8 (error) ERR value is not an integer or out of range 9 127.0.0.1:6379> zrange zset-key 0 -1e withscores 10 (error) ERR value is not an integer or out of range 11 127.0.0.1:6379> zrange zset-key 0 -1 withscores 12 1) "membe1" 13 2) "728" 14 3) "member0" 15 4) "899" 16 127.0.0.1:6379> zrange zset-key 0 800 withscores 17 1) "membe1" 18 2) "728" 19 3) "member0" 20 4) "899" 21 127.0.0.1:6379> zrangebyscore zset-key 0 800 withscores 22 1) "membe1" 23 2) "728" 24 127.0.0.1:6379> zrem zset-key member0 25 (integer) 1 26 127.0.0.1:6379> zrem zset-key member0 27 (integer) 0 28 127.0.0.1:6379> zrange zset-key 0 -1 withscores 29 1) "membe1" 30 2) "728"