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Cluster cluster addslots（集群 槽位） cluster count failure reports（集群計(jì)數(shù)失敗報(bào)告） cluster countkeysinslot cluster delslots cluster failover cluster forget cluster getkeysinslot cluster info cluster keyslot（集群鍵槽） cluster meet cluster nodes（集群節(jié)點(diǎn)） cluster replicate（集群復(fù)制） cluster reset（集群重置） cluster saveconfig cluster set config epoch cluster setslot cluster slaves cluster slots readonly readwrite Connection auth echo ping quit select swapdb Geo geoadd geodist geohash geopos georadius georadiusbymember Hashes hdel hexists hget hgetall hincrby hincrbyfloat hkeys hlen hmget hmset hscan hset hsetnx hstrlen hvals HyperLogLog pfadd pfcount pfmerge Keys del dump exists expire expireat keys migrate move object persist pexpire pexpireat pttl randomkey rename renamenx restore scan sort touch ttl type unlink wait Lists blpop brpop brpoplpush lindex linsert llen lpop lpush lpushx lrange lrem lset ltrim rpop rpoplpush rpush rpushx Pub/Sub psubscribe publish pubsub punsubscribe subscribe unsubscribe Scripting eval evalsha script debug script exists script flush script kill script load Server bgrewriteaof bgsave client getname client kill client list client pause client reply client setname command command count command getkeys command info config get config resetstat config rewrite config set dbsize debug object debug segfault flushall flushdb info lastsave monitor role save shutdown slaveof slowlog time Sets sadd scard sdiff sdiffstore sinter sinterstore sismember smembers smove spop srandmember srem sscan sunion sunionstore Sorted Sets zadd zcard zcount zincrby zinterstore zlexcount zrange zrangebylex zrangebyscore zrank zrem zremrangebylex zremrangebyrank zremrangebyscore zrevrange zrevrangebylex zrevrangebyscore zrevrank zscan zscore zunionstore Strings append bitcount bitfield bitop bitpos decr decrby get getbit getrange getset incr incrby incrbyfloat mget mset msetnx psetex set setbit setex setnx setrange strlen Transactions discard exec multi unwatch watch
characters 

SUNION key [key ...]

自1.0.0起可用。

時(shí)間復(fù)雜度： O（N）其中N是所有給定集合中元素的總數(shù)。

返回從所有給定集合的聯(lián)合中產(chǎn)生的集合的成員。

例如：

key1 = {a,b,c,d}key2 = {c}key3 = {a,c,e}SUNION key1 key2 key3 = {a,b,c,d,e}

不存在的鍵被認(rèn)為是空集。

返回值

陣列回復(fù)：列出結(jié)果集的成員。

例子

redis>  SADD key1 "a" (integer) 1 

redis>  SADD key1 "b" (integer) 1 

redis>  SADD key1 "c" (integer) 1 

redis>  SADD key2 "c" (integer) 1 

redis>  SADD key2 "d" (integer) 1 

redis>  SADD key2 "e" (integer) 1 

redis>  SUNION key1 key2 1) "a" 2) "c" 3) "e" 4) "b" 5) "d"

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