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Commands

Introduction
Strings
- STRINGS Introduction
- SET
- SETS Ent
- DEL
- DELS Ent
- GET
- GETEX 6.2
- GETDEL 6.2
- INCR
- DECR
- INCRBY
- DECRBY
- INCRBYFLOAT
- SETNX
- SETEX
- PSETEX
- MSET
- MGET
- MSETNX
- APPEND
- APPENDS Ent
- STRLEN
- SETRANGE
- GETRANGE
- STRALGO
- GETSET
Lists
- LISTS Introduction
- LPUSH
- LPUSHS Ent
- RPOP
- LPOP
- RPUSH
- RPUSHS Ent
- LRANGE
- LLS Ent
- LREVRANGE Ent
- LLEN
- LINDEX
- LPOS 6.0.6
- LSET
- LINSERT
- LREM
- LRM Ent
- LTRIM
- LMOVE 6.2
- RPOPLPUSH
- LPUSHX
- RPUSHX
- BLPOP
- BRPOP
- BLMOVE 6.2
- BRPOPLPUSH
Sets
- SETS Introduction
- SADD
- SADDS Ent
- SREM
- SRM Ent
- SMEMBERS
- SLS Ent
- SCARD
- SLEN Ent
- SUNION
- SINTER
- SDIFF
- SUNIONSTORE
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- SDIFFSTORE
- SISMEMBER
- SMISMEMBER 6.2
- SMOVE
- SPOP
- SRANDMEMBER
- SSCAN
Sorted Sets (ZSets)
Hashes
- HASHES Introduction
- HSET
- HSETS Ent
- HDEL
- HRM Ent
- HGET
- HLEN
- HMSET
- HMGET
- HKEYS
- HVALS
- HGETALL
- HLS Ent
- HSTRLEN
- HINCRBY
- HINCRBYFLOAT
- HEXISTS
- HSETNX
- HSCAN
- HRANDFIELD 6.2
Streams
- STREAMS Introduction
- XADD
- XADDS Ent
- XLEN
- XRANGE
- XREVRANGE
- XREAD
- XDEL
- XDELS Ent
- XTRIM
- XGROUP
- XREADGROUP
- XACK
- XPENDING
- XCLAIM
- XAUTOCLAIM 6.2
- XINFO
Common Keys
- COMMON Introduction
- EXISTS
- UNLINK
- KEYS
- LS Ent
- SCAN
- SORT
- RENAME
- RENAMENX
- EXPIRE
- EXPIREAT
- TTL
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- PERSIST
- PERSISTS Ent
- TYPE
- OBJECT
- RANDOMKEY
- COPY 6.2
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- RESTORE
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- TOUCH
- LOLWUT
Recyclebin New
Bits
- BITS Introduction
- SETBIT
- GETBIT
- BITOP
- BITCOUNT
- BITFIELD
- BITPOS
Pub/Sub
- Pub/Sub Introduction
Lua Script
HyperLogLog(PF)
Geo
Connection
- Connection Introduction
- CONNECT
- AUTH
- HELLO 6.0
- ECHO
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- QUIT
- SELECT
- CD Ent
- SWAPDB
- RESET 6.2
Redis on Windows

XLEN

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스트림의 엔트리(ID) 개수 리턴

사용법은 XLEN key입니다.

Example

명령>	XLEN sensor-1234
결과>	(integer) 2

	해당 키가 존재하지 않는 경우에도 0을 리턴합니다. 그러므로 키 존재여부는 EXISTS 명령으로 확인해야 합니다.

명령문

XLEN key

이 명령은 version 5.0.0 부터 사용할 수 있다.
논리적 처리 소요시간은 O(log(1))이다.

<< XADD	XLEN	XRANGE >>

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