Sets in Redis
From the Redis cheat sheet · Data Structures · verified Jul 2026
Sets
Unordered collections of unique strings
bash
# Add members
SADD myset "member1"
SADD myset "member2"
# Check membership
SISMEMBER myset "member1"
# Get all members
SMEMBERS myset
# Set operations
SUNION set1 set2 # Union
SINTER set1 set2 # Intersection
SDIFF set1 set2 # Difference🎯 Guarantees unique members
⚡ O(1) add, remove, and check
🔄 Powerful set operations (union, intersection)
🎲 Random member selection support