Redis集合命令详解

1.创建集合

db01:6379> SADD set1 1 2 3
(integer) 3
db01:6379> SADD set2 1 3 5 7
(integer) 4

2.查看集合的成员

db01:6379> SMEMBERS set1
1) "1"
2) "2"
3) "3"

db01:6379> SMEMBERS set2
1) "1"
2) "3"
3) "5"
4) "7"

3.查看集合的差集,以前面一个集合为基准对比后面的，前面有，后面没有则选出来

db01:6379> SDIFF set1 set2
1) "2"

db01:6379> SDIFF set2 set1
1) "7"

4.查看集合的交集

db01:6379> SINTER set1 set2
1) "1"
2) "3"
3) "5"

5.查看集合的并集

db01:6379> SUNION set1 set2
1) "1"
2) "2"
3) "3"
4) "5"
5) "7"

db01:6379> SUNION set1 set2 set3
1) "1"
2) "2"
3) "3"
4) "5"
5) "7"
6) "9"

注：集合不允许出现重复的值