redis 交集、并集、差集的具体使用

redis> SMEMBERS group_1
1) "LI LEI"
2) "TOM"
3) "JACK"

redis> SMEMBERS group_2
1) "HAN MEIMEI"
2) "JACK"

redis> SINTER group_1 group_2  # 取的是交集的数据 
1) "JACK"

redis> SMEMBERS songs
1) "Billie Jean"

redis> SMEMBERS my_songs
1) "Believe Me"

redis> SUNION songs my_songs  # 取的是集合的并集数据据
1) "Billie Jean"
2) "Believe Me"

redis> SMEMBERS peter_movies
1) "bet man"
2) "start war"
3) "2012"

redis> SMEMBERS joe_movies
1) "hi, lady"
2) "Fast Five"
3) "2012"

redis> SDIFF peter_movies joe_movies  # 取的是两个集合的差集的数据
1) "bet man"
2) "start war"

redis> SMEMBERS songs
1) "good bye joe"
2) "hello,peter"

redis> SMEMBERS my_songs
1) "good bye joe"
2) "falling"

redis> SINTERSTORE song_interset songs my_songs   # 将交集的数据存储到 song_interset 对象中
(integer) 1

redis> SMEMBERS song_interset     # 查看 song_interset 对象中的 所有数据
1) "good bye joe"

redis> SMEMBERS NoSQL
1) "MongoDB"
2) "Redis"

redis> SMEMBERS SQL
1) "sqlite"
2) "MySQL"

redis> SUNIONSTORE db NoSQL SQL  # 将并集的数据存储到 db 对象中
(integer) 4

redis> SMEMBERS db   # 查看 db 对象中的 所有数据
1) "MySQL"
2) "sqlite"
3) "MongoDB"
4) "Redis"

redis> SMEMBERS joe_movies
1) "hi, lady"
2) "Fast Five"
3) "2012"

redis> SMEMBERS peter_movies
1) "bet man"
2) "start war"
3) "2012"

redis> SDIFFSTORE joe_diff_peter joe_movies peter_movies   # 将差集的数据存储到 joe_diff_peter 对象中
(integer) 2

redis> SMEMBERS joe_diff_peter    # 查看 joe_diff_peter 对象中的 所有数据
1) "hi, lady"
2) "Fast Five"