Redis set structure command

Set features ：

1 . Disorder 2 . Uniqueness 3 . deterministic

Add to collection ( Existing values will not enter the set )	sadd key value .....
Look at all the elements in the collection	smembers k vey
Delete elements from the collection	srem key value
Randomly select an element in the set and delete it after returning	spop key
Randomly extract an element without deleting	srandmember key
Check whether there is this element in the collection	sismember key value
See how many elements there are in this collection	scard
from set1 Move value To set2	smore set1 set2 value
In multiple sets value Intersection	sinter set1 set2 ......
In multiple sets value Union	sunion set1 set2 set3
In multiple sets value The difference between the set	sdiff set1 set2 set3
The intersection of multiple sets is stored in another set	sinterstore key set1 set2 set3

Ordered set （order set）

Add to ordered collection	zadd key score1 value1 score2 value2
View the elements in the ordered collection ( Sort query ) withscores( At the same time, find out store)	zrange key start shop withscores( Don't write )
Take value by identification （score） Inquire about    （num) Take a few	zrangebyscore key min max    After add limit offset num
Query out value In the set score Which place is it	zrank key value （ Ascending ） zrevrange key value ( Descending )
Delete that element in the collection Conditions term1~term2 Between Elements   Delete	zrem key value1 value2..... zremrangebyscore key term1 term2
Statistics set The number of elements in	zcard key
Statistics set in term1~term2 Between the elements	zcount key term1 term2
Operations between multiple sets	zinterstore set3 num( identification ) set1 set2 aggregate sum/min/max
Merge two sets And find the intersection	zinterstore set3 num( identification ) set1 set2 withscores