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19 <b>ZincrbyCommand: Contents
</b><br> <a href=
"#ZINCRBY _key_ _increment_ _member_ (Redis >">ZINCRBY _key_ _increment_ _member_ (Redis
></a><br> <a href=
"#Return value">Return value
</a>
22 <h1 class=
"wikiname">ZincrbyCommand
</h1>
29 #sidebar
<a href=
"SortedSetCommandsSidebar.html">SortedSetCommandsSidebar
</a><h1><a name=
"ZINCRBY _key_ _increment_ _member_ (Redis >">ZINCRBY _key_ _increment_ _member_ (Redis
></a></h1> 1.1) =
30 <i>Time complexity O(log(N)) with N being the number of elements in the sorted set
</i><blockquote>If
<i>member
</i> already exists in the sorted set adds the
<i>increment
</i> to its scoreand updates the position of the element in the sorted set accordingly.If
<i>member
</i> does not already exist in the sorted set it is added with_increment_ as score (that is, like if the previous score was virtually zero).If
<i>key
</i> does not exist a new sorted set with the specified_member_ as sole member is crated. If the key exists but does not hold asorted set value an error is returned.
</blockquote>
31 <blockquote>The score value can be the string representation of a double precision floatingpoint number. It's possible to provide a negative value to perform a decrement.
</blockquote>
32 <blockquote>For an introduction to sorted sets check the
<a href=
"IntroductionToRedisDataTypes.html">Introduction to Redis data types
</a> page.
</blockquote>
33 <h2><a name=
"Return value">Return value
</a></h2><a href=
"ReplyTypes.html">Bulk reply
</a><pre class=
"codeblock python" name=
"code">
34 The new score (a double precision floating point number) represented as string.