ZADD key score member [score member ...]

Adds all the specified members with the specified scores to the sorted set stored at key. It is possible to specify multiple score/member pairs. If a specified member is already a member of the sorted set, the score is updated and the element reinserted at the right position to ensure the correct ordering. If key does not exist, a new sorted set with the specified members as sole members is created, like if the sorted set was empty. If the key exists but does not hold a sorted set, an error is returned.

The score values should be the string representation of a numeric value, and accepts double precision floating point numbers.

For an introduction to sorted sets, see the data types page on sorted sets.

Return value

Integer reply, specifically:

• The number of elements added to the sorted sets, not including elements already existing for which the score was updated.

History

• >= 2.4: Accepts multiple elements. In Redis versions older than 2.4 it was possible to add or update a single member per call.

Examples

(integer) 1

(integer) 1

(integer) 1

(integer) 0

1) "one"
2) "1"
3) "uno"
4) "1"
5) "two"
6) "3"