Redis Set SDIFFSTORE Command
The Redis SDIFFSTORE command stores the difference between the specified sets in a given destination set. If the destination set already exists, it will be overwritten.
Syntax
The basic syntax of the SDIFFSTORE command is as follows:
1 | SDIFFSTORE destination key [key ...] |
This command is equal to SDIFF, but instead of returning the resulting set, it is stored in destination.
Available Since
Redis version >= 1.0.0
Time Complexity
O(N) where N is the total number of elements in all given sets.
ACL Categories
@write, @set, @slow
Return Value
Returns the number of elements in the resulting set.
Example
1 | 127.0.0.1:6379> SADD key1 a b c d |
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