Redis Zrem Command

Redis ordered set (sorted set)

Redis Zrem command is used to remove one or more members from a sorted set. Non-existent members will be ignored.

When the key exists but is not of a sorted set type, an error is returned.

Note:Before Redis version 2.4, ZREM could only delete one element at a time.

Syntax

The basic syntax of the redis Zrem command is as follows:

redis 127.0.0.1:6379> ZREM key member [member ...]

Available Versions

>= 1.2.0

Return Value

The number of members successfully removed, excluding ignored members.

Examples

# 测试数据

redis 127.0.0.1:6379> ZRANGE page_rank 0 -1 WITHSCORES
1) "bing.com"
2) "8"
3) "baidu.com"
4) "9"
5) "google.com"
6) "10"


# 移除单个元素

redis 127.0.0.1:6379> ZREM page_rank google.com
(integer) 1

redis 127.0.0.1:6379> ZRANGE page_rank 0 -1 WITHSCORES
1) "bing.com"
2) "8"
3) "baidu.com"
4) "9"


# 移除多个元素

redis 127.0.0.1:6379> ZREM page_rank baidu.com bing.com
(integer) 2

redis 127.0.0.1:6379> ZRANGE page_rank 0 -1 WITHSCORES
(empty list or set)


# 移除不存在元素

redis 127.0.0.1:6379> ZREM page_rank non-exists-element
(integer) 0

Redis ordered set (sorted set)

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