+
+ 
+
+
+
+
+
+
+
+
+
+ ZaddCommand
+ +
+
+
+
+
+ #sidebar SortedSetCommandsSidebar
+
+ ZADD _key_ _score_ _member_ (Redis >
1.1) = +Time complexity O(log(N)) with N being the number of elements in the sorted setAdd the specified member having the specifeid score to the sortedset stored at key. If member is already a member of the sorted setthe score is updated, and the element reinserted in the right position toensure sorting. If key 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.+
The score value can be the string representation of a double precision floatingpoint number.+
For an introduction to sorted sets check the Introduction to Redis data types page.+
Return value
Integer reply, specifically:+1 if the new element was added +0 if the element was already a member of the sorted set and the score was updated ++