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  19 <b>SunionCommand: Contents
</b><br>  <a href=
"#SUNION _key1_ _key2_ ... _keyN_">SUNION _key1_ _key2_ ... _keyN_
</a><br>    <a href=
"#Return value">Return value
</a> 
  22                 <h1 class=
"wikiname">SunionCommand
</h1> 
  29                     #sidebar 
<a href=
"SetCommandsSidebar.html">SetCommandsSidebar
</a><h1><a name=
"SUNION _key1_ _key2_ ... _keyN_">SUNION _key1_ _key2_ ... _keyN_
</a></h1> 
  30 <i>Time complexity O(N) where N is the total number of elements in all the provided sets
</i><blockquote>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 
<a href=
"SmembersCommand.html">SMEMBERS
</a>.
</blockquote> 
  31 <blockquote>Non existing keys are considered like empty sets.
</blockquote> 
  32 <h2><a name=
"Return value">Return value
</a></h2><a href=
"ReplyTypes.html">Multi bulk reply
</a>, specifically the list of common elements.