SUNIONSTORE

This command is equal to SUNION, but instead of returning the resulting set, it is stored in destination.

If destination already exists, it is overwritten.

Return value

Integer reply: the number of elements in the resulting set.

Examples

redis> SADD key1 "a"

(integer) 1

redis> SADD key1 "b"

(integer) 1

redis> SADD key1 "c"

(integer) 1

redis> SADD key2 "c"

(integer) 1

redis> SADD key2 "d"

(integer) 1

redis> SADD key2 "e"

(integer) 1

redis> SUNIONSTORE key key1 key2

(integer) 5

redis> SMEMBERS key

1) "a" 2) "c" 3) "e" 4) "b" 5) "d" redis>