Redis Sorted Set: Create (Detailed Guide w/ Code Examples)

Use Case(s)

  • Ranking systems (e.g., leaderboards and high scores).
  • Time-based events sorting.
  • Prioritized work queues where tasks need to be processed in a specific order.

Code Examples

Creating a sorted set in Redis involves adding members with associated scores. Here’s how you can do it in Python, Node.js, and Golang:


import redis r = redis.Redis(host='localhost', port=6379, db=0) # Adding elements to the sorted set r.zadd('my_sorted_set', {'element1': 10, 'element2': 20, 'element3': 30}) # Verifying the sorted set creation print(r.zrange('my_sorted_set', 0, -1, withscores=True))


const redis = require('redis'); const client = redis.createClient(); client.on('connect', () => { console.log('Connected to Redis'); }); // Adding elements to the sorted set client.zadd('my_sorted_set', 10, 'element1', 20, 'element2', 30, 'element3', (err, response) => { if (err) throw err; console.log(response); // Verifying the sorted set creation client.zrange('my_sorted_set', 0, -1, 'WITHSCORES', (err, result) => { if (err) throw err; console.log(result); client.quit(); }); });


package main import ( "fmt" "" "context" ) func main() { ctx := context.Background() rdb := redis.NewClient(&redis.Options{ Addr: "localhost:6379", DB: 0, }) // Adding elements to the sorted set rdb.ZAdd(ctx, "my_sorted_set", &redis.Z{Score: 10, Member: "element1"}) rdb.ZAdd(ctx, "my_sorted_set", &redis.Z{Score: 20, Member: "element2"}) rdb.ZAdd(ctx, "my_sorted_set", &redis.Z{Score: 30, Member: "element3"}) // Verifying the sorted set creation result, _ := rdb.ZRangeWithScores(ctx, "my_sorted_set", 0, -1).Result() for _, z := range result { fmt.Println(z.Member, z.Score) } }

Best Practices

  • Ensure unique member names within the same sorted set to avoid unexpected behavior.
  • Use pipelines or transactions for bulk inserts to improve performance.
  • Regularly monitor and optimize memory usage, especially for large sorted sets.

Common Mistakes

  • Forgetting to specify scores when adding elements to the sorted set.
  • Overlooking connection management, leading to potential connection leaks.
  • Incorrectly assuming that ZADD will update both the score and position of an existing element; it will only update the score.


Q: How does Redis handle duplicate members in a sorted set? A: Redis allows duplicate members but will update the score of an existing member if added again.

Q: What happens if two members have the same score? A: Members are ordered lexicographically by their value when they have the same score.

Was this content helpful?

Start building today

Dragonfly is fully compatible with the Redis ecosystem and requires no code changes to implement.