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HLEN key

相关命令

• HDEL
• HEXISTS
• HGET
• HGETALL
• HINCRBY
• HINCRBYFLOAT
• HKEYS
• HLEN
• HMGET
• HMSET
• HSCAN
• HSET
• HSETNX
• HVALS

Available since 2.0.0.

时间复杂度： O(1)

Returns the number of fields contained in the hash stored at key.

返回值

Integer reply: number of fields in the hash, or 0 when key does not exist.

例子

redis> HSET myhash field1 "Hello"

(integer) 1

redis> HSET myhash field2 "World"

(integer) 1

redis> HLEN myhash

(integer) 2

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