SunionCommand: Contents
SUNION _key1_ _key2_ ... _keyN_
Return value

# SunionCommand

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# SUNION _key1_ _key2_ ... _keyN_

Time complexity O(N) where N is the total number of elements in all the provided sets

> Return the members of a set resulting from the union of all thesets hold at the specified keys. Like in LRANGE the result is sent tothe client as a multi-bulk reply (see the protocol specification formore information). If just a single key is specified, then this commandproduces the same result as SMEMBERS.

> Non existing keys are considered like empty sets.

## Return value

Multi bulk reply, specifically the list of common elements.