Redis Note9:Redis-Key—ZSet

1. ZSet

1.1 添加：zadd

127.0.0.1:6379> zadd myzset 1 one 2 two 3 three
(integer) 3
127.0.0.1:6379> ZRANGE myzset 0 -1
1) "one"
2) "two"
3) "three"

1.2 排序：ZRANGEBYSCORE

• -inf：负无穷

127.0.0.1:6379> zadd salary 2500 james
(integer) 1
127.0.0.1:6379> zadd salary 5000 curry
(integer) 1
127.0.0.1:6379> zadd salary 500 wade
(integer) 1

# 排序
127.0.0.1:6379> ZRANGEBYSCORE salary -inf +inf
1) "wade"
2) "james"
3) "curry"

# 排序带参数
127.0.0.1:6379> ZRANGEBYSCORE salary -inf +inf withscores
1) "wade"
2) "500"
3) "james"
4) "2500"
5) "curry"
6) "5000"

# 薪水小于2500员工的升序排列
127.0.0.1:6379> ZRANGEBYSCORE salary -inf 2500 withscores
1) "wade"
2) "500"
3) "james"
4) "2500"

# 从大大小排序
127.0.0.1:6379> ZREVRANGE salary 0 -1
1) "james"
2) "wade"

1. 3 移除元素：zrem

127.0.0.1:6379> ZRANGE myzset 0 -1
1) "one"
2) "two"
3) "three"
127.0.0.1:6379> ZRANGE salary 0 -1
1) "wade"
2) "james"
3) "curry"
# 移除元素
127.0.0.1:6379> zrem salary curry
(integer) 1
127.0.0.1:6379> ZRANGE salary 0 -1
1) "wade"
2) "james"

1. 4 获取有序集合的个数：ZCARD

127.0.0.1:6379> ZCARD salary
(integer) 2

1. 5 获取区间成员数量：zcount

127.0.0.1:6379> ZRANGE myset 0 -1
1) "hello"
2) "world"
3) "redis"
127.0.0.1:6379> zcount myset 1 3
(integer) 3
127.0.0.1:6379> zcount myset 1 2
(integer) 2

2.总结