SUNION
SUNION key [key ...]
- Available since:
- Redis Open Source 1.0.0
- Time complexity:
- O(N) where N is the total number of elements in all given sets.
- ACL categories:
-
@read,@set,@slow, - Compatibility:
- Redis Software and Redis Cloud compatibility
Note:
This command's behavior varies in clustered Redis environments. See the multi-key operations page for more information.Returns the members of the set resulting from the union of all the given sets.
For example:
key1 = {a,b,c,d}
key2 = {c}
key3 = {a,c,e}
SUNION key1 key2 key3 = {a,b,c,d,e}
Keys that do not exist are considered to be empty sets.
Required arguments
key [key ...]
One or more set keys to union.
Examples
redis> SADD key1 "a" (integer) 1 redis> SADD key1 "b" (integer) 1 redis> SADD key1 "c" (integer) 1 redis> SADD key2 "c" (integer) 1 redis> SADD key2 "d" (integer) 1 redis> SADD key2 "e" (integer) 1 redis> SUNION key1 key2 1) "a" 2) "c" 3) "d" 4) "e" 5) "b"
Redis Software and Redis Cloud compatibility
| Redis Software |
Redis Cloud |
Notes |
|---|---|---|
| ✅ Standard |
✅ Standard |
Return information
Array reply: a list with members of the resulting set.