Redis SUNIONSTORE命令

Redis SUNIONSTORE命令被用來儲存，該組由所有的給定集合的並集所得的成員。不存在鍵被認為是空集。

返回值

返回整數，所得集合元素的數量。

語法

redis SUNIONSTORE命令的基本語法如下所示：

redis 127.0.0.1:6379> SUNIONSTORE DESTINATION KEY KEY1..KEYN

範例

redis 127.0.0.1:6379> SADD myset1 "hello"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "world"
(integer) 1
redis 127.0.0.1:6379> SADD myset1 "bar"
(integer) 1
redis 127.0.0.1:6379> SADD myset2 "hello"
(integer) 1
redis 127.0.0.1:6379> SADD myset2 "bar"
(integer) 1
redis 127.0.0.1:6379> SUNIONSTORE myset myset1 myset2
(integer) 1
redis 127.0.0.1:6379> SMEMBERS myset
1) "bar"
2) "world"
3) "hello"
4) "foo"