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MongoDB / REDIS
What is SADD command in REDIS?
Add the specified members to the set stored at key. Specified members that are already a member of this set are ignored. If key does not exist, a new set is created before adding the specified members.
An error is returned when the value stored at key is not a set.
Usage: SADD key member [member ...]
Example: redis> SADD myset "Hello" (integer) 1 redis> SADD myset "World" (integer) 1 redis> SADD myset "World" (integer) 0 redis> SMEMBERS myset 1) "World" 2) "Hello"
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