redis支持有序集合，即sorted set。sorted set在set的基礎上，增加了排序屬性，是set的升級版。這裏簡要談談sorted set的常用函數：
1)insert
a） zadd
語法：zadd key score member [[score member] [score member] ...]
解釋：增加一個或多個member【根據score排序】到有序集key中，如果member已經存在，只更新score。返回增加member個數，不包含已經存在的member
[root@xsf001 ~]# redis-cli
redis 127.0.0.1:6379> ZADD score 230 zhangsan
(integer) 1
redis 127.0.0.1:6379> zadd score 240 lisi 250 wangwu
(integer) 2
redis 127.0.0.1:6379> zadd score 100 liuli
redis 127.0.0.1:6379> zadd score 249 wangwu
(integer) 0注意：有些redis版本，只能一次添加一個member
2）select
a）zrange
語法：zrange key start stop [withscores]
解釋：返回有續集key中指定範圍【通過索引 start stop】的member[及其score]；
redis 127.0.0.1:6379> zrange score 0 -1 #所有元素
1) "liuli"
2) "zhangsan"
3) "lisi"
4) "wangwu"
redis 127.0.0.1:6379> zrange score 0 -1 withscores #所有member及score
1) "liuli"
2) "100"
3) "zhangsan"
4) "230"
5) "lisi"
6) "240"
7) "wangwu"
8) "249"
redis 127.0.0.1:6379> zrange score 0 2 withscores #前三個元素
1) "liuli"
2) "100"
3) "zhangsan"
4) "230"
5) "lisi"
6) "240"
redis 127.0.0.1:6379> zrange score 0 -2 #第一個元素到
1) "liuli"
2) "zhangsan"
3) "lisi"注意：0，表示第一個元素，-1 表示最後一個元素，-2 表示倒數第二個元素
b）zcount
語法：zcount key min max
解釋：統計key中score值介於min 和max之間的member個數
redis 127.0.0.1:6379> zrange score 0 -1 withscores
1) "liuli"
2) "100"
3) "zhangsan"
4) "230"
5) "lisi"
6) "240"
7) "wangwu"
8) "249"
redis 127.0.0.1:6379> zcount score 230 240 # count（score >=230 && score <=240）
(integer) 2語法：zscore key member
解釋：返回有續集key中member的score
redis 127.0.0.1:6379> zscore score liuli
"100"d）zrevrange
語法：zrevrange key start stop [withscores]
解釋：返回有續集key中指定範圍[通過索引start stop]的member[及score]，返回member根據score按降序排列
redis 127.0.0.1:6379> zrevrange score 0 -1 withscores
1) "wangwu"
2) "249"
3) "lisi"
4) "240"
5) "zhangsan"
6) "230"
7) "liuli"
8) "100"
redis 127.0.0.1:6379> zrevrange score 1 -2
1) "lisi"
2) "zhangsan"注意：索引0 表示第一個元素，-1 最後一個元素，-2 倒數第二個元素；依次類推
e）zrangebyscore
語法：zrangebyscore key min max [withscores] [limit offset count]
解釋：返回有續集key中，score大於等於min並且小於等於max的member。返回結果按照score遞增的次序排列。可選withscores決定返回結果集中僅僅返回member還是返回member和score；可選參數limit 指定返回結果的數量區間。
redis 127.0.0.1:6379> zrangebyscore score 100 10000 withscores
1) "liuli"
2) "100"
3) "zhangsan"
4) "230"
5) "lisi"
6) "240"
7) "wangwu"
8) "249"
redis 127.0.0.1:6379> zrangebyscore score 100 10000 limit 1 3
1) "zhangsan"
2) "lisi"
3) "wangwu"f）zrevrangebyscore
語法：zrevrangescore key max min [withscores] [limit offset count]
解釋：返回有續集key中score<=max並且score>=min 的元素，返回結果根據score從大到小順序排列。可選參數withscores決定結果集中是否包含score，可選參數limit 指定返回結果集範圍。
redis 127.0.0.1:6379> zrevrangebyscore score 0 10000
(empty list or set)
redis 127.0.0.1:6379> zrevrangebyscore score 10000 0
1) "wangwu"
2) "lisi"
3) "zhangsan"
4) "liuli"
redis 127.0.0.1:6379> zrevrangebyscore score 10000 0 withscores limit 0, 2
1) "wangwu"
2) "249"
3) "lisi"
4) "240"注意：max在min之前
g）zrank
語法：zrank key member
解釋：根據score從低到高，返回member在有續集中的index
redis 127.0.0.1:6379> zrange score 0 -1
1) "liuli"
2) "zhangsan"
3) "lisi"
4) "wangwu"
redis 127.0.0.1:6379> zrank score liuli
(integer) 0
redis 127.0.0.1:6379> zrank score wangwu
(integer) 3
h）zrevrank
語法：zrevrank key member
解釋：根據score從高到低排序，返回member在有序集key中的index
redis 127.0.0.1:6379> zrange score 0 -1
1) "liuli"
2) "zhangsan"
3) "lisi"
4) "wangwu"
redis 127.0.0.1:6379> zrevrank score liuli
(integer) 3
redis 127.0.0.1:6379> zrevrank score wangwu
(integer) 0語法：zcard key
解釋：返回有續集key的基數
redis 127.0.0.1:6379> zcard score
(integer) 4
redis 127.0.0.1:6379> zcard stdu #有續集不存在返回0
(integer) 03）update
a）zincrby
語法：zincrby key increment member
解釋：有續集key的member增加增量increment，返回增加後的score
redis 127.0.0.1:6379> zscore score liuli
"100"
redis 127.0.0.1:6379> zincrby score 300 liuli
"400"
redis 127.0.0.1:6379> zscore score liuli
"400"
redis 127.0.0.1:6379> zincrby score 500 xie
"500"
注意：如果member在key中不存在，則新增個member
4）delete
a）zrem
語法：zrem key member [member ...]
解釋：移除有續集中的一個或多個member，返回移除member的個數
redis 127.0.0.1:6379> zrange score 0 -1
1) "zhangsan"
2) "lisi"
3) "wangwu"
4) "liuli"
5) "xie"
redis 127.0.0.1:6379> zrem score xie wwww #www不存在
(integer) 1
redis 127.0.0.1:6379> zrange score 0 -1
1) "zhangsan"
2) "lisi"
3) "wangwu"
4) "liuli"注意:如果member不存在，則忽略
b）zremrangebyrank
語法：zremrangebyrank key start stop
解釋：移除有續集中指定排名範圍【start stop】的元素，返回移除元素個數
redis 127.0.0.1:6379> zrange score 0 -1
1) "zhangsan"
2) "lisi"
3) "wangwu"
4) "liuli"
redis 127.0.0.1:6379> zremrangebyrank score 0 1
(integer) 2
redis 127.0.0.1:6379> zrange score 0 -1
1) "wangwu"
2) "liuli"注意：如果stop在start之前，則移除0個
c）zremrangebyscore
語法：zremrangebyscore key min max
解釋：移除有續集中的member，移除member的score大於等於min小於等於max；返回移除元素個數
redis 127.0.0.1:6379> zrange score 0 -1 withscores
1) "wangwu"
2) "249"
3) "liuli"
4) "400"
redis 127.0.0.1:6379> zremrangebyscore score 248 250
(integer) 1
redis 127.0.0.1:6379> zrange score 0 -1 withscores
1) "liuli"
2) "400"5）其他
a）zinterstore
語法：zinterstore destination numkeys key[key...] [weights weight] [aggregate sum|min|max]
解釋：統計多個有續集的交集，其中有續集key的個數必須以numkeys參數指定，並將統計結果存儲到destination。默認情況下，destination中元素的score是各個有續集key中元素的score之和。使用weights爲每個有續集指定個乘法因子，每個有續集的score在傳遞給集合函數（aggregate）之前，先乘以乘法因子。如果沒指定乘法因子weight，默認是1；使用aggregate選項指定交集的聚合方式。min，最小score，max，最大score，sum，求和。
redis 127.0.0.1:6379> zrange score 0 -1 withscores
1) "lisi"
2) "20"
3) "liuli"
4) "400"
redis 127.0.0.1:6379> zrange score1 0 -1 withscores
1) "wangwu"
2) "20"
3) "liuli"
4) "30"
redis 127.0.0.1:6379> zinterstore dest 2 score score1 #交集求和 sum（score.member.score * 1 + score1.member.score * 1）
(integer) 1
redis 127.0.0.1:6379> zrange dest 0 -1 withscores
1) "liuli"
2) "430"
redis 127.0.0.1:6379> zinterstore dest 2 score score1 weights 1 2 #交集求和，sum（score.member.score * 1 + score1.member.score * 2）
(integer) 1
redis 127.0.0.1:6379> zrange dest 0 -1 withscores
1) "liuli"
2) "460"
redis 127.0.0.1:6379> zinterstore dest 2 score score1 aggregate min #交集求最小值，min（score.member.score * 1 , score1.member.score * 1）
(integer) 1
redis 127.0.0.1:6379> zrange dest 0 -1 withscores
1) "liuli"
2) "30"
redis 127.0.0.1:6379> zinterstore dest 2 score score1 aggregate max #交集求最大值 max（score.member.score * 1 , score1.member.score * 1）
(integer) 1
redis 127.0.0.1:6379> zrange dest 0 -1 withscores
1) "liuli"
2) "400"
redis 127.0.0.1:6379> zinterstore dest 2 score score1 aggregate sum #交集求和，sum（score.member.score * 1 , score1.member.score * 1）
(integer) 1
redis 127.0.0.1:6379> zrange dest 0 -1 withscores
1) "liuli"
2) "430"
redis 127.0.0.1:6379> zinterstore dest 2 score score1 weights 1 2 aggregate min #交集求最小值 min（score.member.score * 1 , score1.member.score * 2）
(integer) 1
redis 127.0.0.1:6379> zrange dest 0 -1 withscores
1) "liuli"
2) "60"
b）zunionstore
語法：zunionstore destination numkeys key[key...] [weights weight] [aggregate sum|min|max]
解釋：統計多個有續集的並集，其中有續集key的個數必須以numkeys參數指定，並將統計結果存儲到destination。。默認情況下，destination中元素的score是各個有續集key中元素的score之和。weights指定乘法因子，aggregate指定聚合方式，詳情，請參閱 zinterstore 中介紹
redis 127.0.0.1:6379> zrange score 0 -1 withscores
1) "lisi"
2) "20"
3) "liuli"
4) "400"
redis 127.0.0.1:6379> zrange score1 0 -1 withscores
1) "wangwu"
2) "20"
3) "liuli"
4) "30"
redis 127.0.0.1:6379> zunionstore dest 2 score score1 #交集求和 sum（score.member.score * 1 , score1.member.score * 1）
(integer) 3
redis 127.0.0.1:6379> zrange dest 0 -1 withscores
1) "lisi"
2) "20"
3) "wangwu"
4) "20"
5) "liuli"
6) "430"
redis 127.0.0.1:6379> zunionstore dest 2 score score1 weights 1 2 aggregate sum #交集求和 sum（score.member.score * 1 , score1.member.score * 2）
(integer) 3
redis 127.0.0.1:6379> zrange dest 0 -1 withscores
1) "lisi"
2) "20"
3) "wangwu"
4) "40"
5) "liuli"
6) "460"
redis 127.0.0.1:6379> zunionstore dest 2 score score1 weights 1 2 aggregate max #交集最大值 max（score.member.score * 1 , score1.member.score * 2）
(integer) 3
redis 127.0.0.1:6379> zrange dest 0 -1 withscores
1) "lisi"
2) "20"
3) "wangwu"
4) "40"
5) "liuli"
6) "400"
redis 127.0.0.1:6379> zunionstore dest 2 score score1 weights 2 4 aggregate min #交集最小值 min（score.member.score * 2 , score1.member.score * 4）
(integer) 3
redis 127.0.0.1:6379> zrange dest 0 -1 withscores
1) "lisi"
2) "40"
3) "wangwu"
4) "80"
5) "liuli"
6) "120"提醒:sorted set的所有函數，請用下面方式查看
[root@xsf001 ~]# redis-cli
redis 127.0.0.1:6379> help @sorted_set