Redis（三）
Redis（三）
本文分为以下部分：
三种特殊类型
geospatial 地理位置
geoadd 添加地理位置
127.0.0.1:6379> FLUSHDB
OK
#常用格式
#geoadd key 经度 维度 名称
127.0.0.1:6379> GEOADD city 115.8921 28.6764 nanchang
(integer) 1
127.0.0.1:6379> geoadd city 121.4726 31.2317 shanghai
(integer) 1
127.0.0.1:6379> geoadd city 116.4052 39.9049 beijing 117.1901 39.1255 tianjin 112.9822 28.1940 changsha
(integer) 3
zrange、zrem
底层为zset，所以同样用 zrange 查看，zrem 来删除
127.0.0.1:6379> geoadd city 10 10 test
(integer) 1
127.0.0.1:6379> zrange city 0 -1
1) "test"
2) "changsha"
3) "nanchang"
4) "shanghai"
5) "tianjin"
6) "beijing"
127.0.0.1:6379> zrem city test
(integer) 1
127.0.0.1:6379> zrange city 0 -1
1) "changsha"
2) "nanchang"
3) "shanghai"
4) "tianjin"
5) "beijing"
geopos 获取城市经纬度
127.0.0.1:6379> GEOPOS city beijing
1) 1) "116.40520244836807251"
2) "39.90489970767192318"
127.0.0.1:6379> GEOPOS city beijing tianjin
1) 1) "116.40520244836807251"
2) "39.90489970767192318"
2) 1) "117.19010263681411743"
2) "39.12550083310794236"
geodist 获取城市之间距离
默认单位为m
- m 米
- km 千米
- ft 英尺
- mi 英里
#geodist key member1 member2 单位
127.0.0.1:6379> geodist city tianjin beijing km
"109.7760"
georadius 中心点多少以内的城市
6.2.0 后弃用，采用 geosearch
#georadius key 经度 纬度 距离 单位
127.0.0.1:6379> GEORADIUS city 120 40 500 km
1) "tianjin"
2) "beijing"
127.0.0.1:6379> GEORADIUS city 120 40 200 km
(empty array)
127.0.0.1:6379> GEORADIUS city 120 40 300 km
1) "tianjin"
geosearch
#GEOSEARCH key [FROMMEMBER 成员] [FROMLONLAT 中心点经度 中心点纬度] [BYRADIUS 半径 单位] [BYBOX 宽 高 单位] [ASC|DESC] [COUNT count [ANY]] [WITHCOORD] [WITHDIST] [WITHHASH]
#以 120 40 为经纬度，查询 500km 以内的城市
127.0.0.1:6379> geosearch city fromlonlat 120 40 byradius 500 km
1) "tianjin"
2) "beijing"
#以 120 40 为经纬度，查询 500km 以内的城市 带直线距离 withdist 和 经纬度 withcoord
127.0.0.1:6379> geosearch city fromlonlat 120 40 byradius 500 km withdist withcoord
1) 1) "tianjin"
2) "259.8183"
3) 1) "117.19010263681411743"
2) "39.12550083310794236"
2) 1) "beijing"
2) "306.6670"
3) 1) "116.40520244836807251"
2) "39.90489970767192318"
#以 120 40 为经纬度，查询 500km 以内的城市 带直线距离 withdist 和 经纬度 withcoord 倒序排序第一个 count 1
127.0.0.1:6379> geosearch city fromlonlat 120 40 byradius 500 km withdist withcoord desc count 1
1) 1) "beijing"
2) "306.6670"
3) 1) "116.40520244836807251"
2) "39.90489970767192318"
#以北京为中心，city中的member
127.0.0.1:6379> geosearch city frommember beijing byradius 500 km withdist withcoord desc count 1
1) 1) "tianjin"
2) "109.7760"
3) 1) "117.19010263681411743"
2) "39.12550083310794236"
hyperloglog 计算基数
基数：不重复的元素
pfadd 添加元素
127.0.0.1:6379> flushdb
OK
127.0.0.1:6379> pfadd hyper 1 2 3 4 5 5 6 6
(integer) 1
pfcount 计算基数
127.0.0.1:6379> pfcount hyper
(integer) 6
pfmerge 合并
#pfmerge 目标key 源key
127.0.0.1:6379> pfadd hyper1 6 6 7 8 9 10
(integer) 1
127.0.0.1:6379> pfcount hyper1
(integer) 5
127.0.0.1:6379> pfmerge hyper1 hyper
OK
127.0.0.1:6379> pfcount hyper1
(integer) 10
127.0.0.1:6379> pfcount hyper
(integer) 6
bitmap 比特
setbit 设置值
#setbit key offset 0|1
127.0.0.1:6379> flushdb
OK
127.0.0.1:6379> setbit sign 1 1
(integer) 0
127.0.0.1:6379> setbit sign 2 1
(integer) 0
127.0.0.1:6379> setbit sign 3 0
(integer) 0
127.0.0.1:6379> setbit sign 4 1
(integer) 0
127.0.0.1:6379> setbit sign 5 1
(integer) 0
getbit 获取值
#getbit key offset
127.0.0.1:6379> getbit sign 1
(integer) 1
bitcount 获取为1的个数
#bitcount key [start end]
127.0.0.1:6379> bitcount sign
(integer) 4
