sunionstore 命令

Sunionstore 命令将给定集合的并集存储在指定的集合 destination 中。

语法

SUNIONSTORE DESTINATION KEY KEY1..KEYN

返回值

结果集中的元素数量。

实例

redis> SADD myset1 "hello"
(integer) 1

redis> SADD myset1 "world"
(integer) 1

redis> SADD myset1 "bar"
(integer) 1

redis> SADD myset2 "hello"
(integer) 1

redis> SADD myset2 "bar"
(integer) 1

redis> SUNIONSTORE myset myset1 myset2
(integer) 1

redis> SMEMBERS myset
1) "bar"
2) "world"
3) "hello"
4) "foo"