SUNIONSTORE

Syntax
SUNIONSTORE destination key [key ...]
Available since:
1.0.0
Time complexity:
O(N) where N is the total number of elements in all given sets.
ACL categories:
@write, @set, @slow,

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.

Examples

redis> SADD key1 "a"
"OK"
redis> SADD key1 "b"
"Hello"
redis> SADD key1 "c"
"World"
redis> SADD key1 "a"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SADD key1 "b"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SADD key1 "c"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SADD key2 "c"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SADD key2 "d"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SADD key2 "e"
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SUNIONSTORE key key1 key2
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis> SMEMBERS key
Cannot destructure property 'error' of 'replies[i]' as it is undefined.
redis>

RESP2 Reply

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

RESP3 Reply

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