Redis-set type operation

Set type operation
Set Operation:
Sadd:sadd key value adds an element to the specified key and returns 0 repeatedly to indicate that the add failed
Srem:srem key value deletes the specified value within key
Spop:spop key randomly deletes a value within the key
Smove:smove Key1 Key2 Value adds the value in the Key1 to the Key2

Collection operation:
sdiff:        Sdiff key1 key2         returns elements of Key1 in the difference set of Key1 and Key2
sdiffstore:    sdiffstore key1 key2 key3     The differential set to be returned exists within the Key3
sinter:        sinter key1 key2         return intersection of Key1 and Key2
sinterstore:    sinterstore key1 key2 key3    The intersection exists within the Key3
sunion:        sunion key1 key2         Key1 and Key2
sunionstore:    sunionstore key1 key2 key3    will exist in Key3

Query operation:
Smembers:smembers key Query Key all values
Scard:scard Key returns the number of values in key
Sismember:sismember key value queries for the existence of value within key
Srandmember:srandmember randomly returns a value of key

Redis-set type operation