redis HDEL command
Translation results：
del
UK [del] US [del]
n. Differential operator, inverted triangle
redis HDEL commandsyntax
Function:Delete one or more specified fields in the hash table key. Non-existing fields will be ignored.
Syntax: HDEL key field [field ...]
Description: In versions below Redis2.4, HDEL only A single domain can be deleted. If you need to delete multiple domains in one atomic time, please enclose the command in a MULTI / EXEC block.
Available versions: >= 2.0.0
Time complexity: O(N), N is the number of domains to be deleted .
Returns: The number of successfully removed domains, excluding ignored domains.
redis HDEL commandexample
# 测试数据 redis> HGETALL abbr 1) "a" 2) "apple" 3) "b" 4) "banana" 5) "c" 6) "cat" 7) "d" 8) "dog" # 删除单个域 redis> HDEL abbr a (integer) 1 # 删除不存在的域 redis> HDEL abbr not-exists-field (integer) 0 # 删除多个域 redis> HDEL abbr b c (integer) 2 redis> HGETALL abbr 1) "d" 2) "dog"