1.启动: 2.连接(A连接B电脑): (1)远程连接: (2)本地连接: 3.判断连接是否正常 4.Redis中有十六个数据库,名称是从0到15。我们每次进入的都是零号库,我们可以通过命令来进入其他库。 (1)进入其他库(select) 1.设置键和值 (1)设置键和值(set) (2)设置多个键和值(mset) (3)得到键的值(get) (4)得到多个键的值(mget) (5)得到所有键(keys *) (6)查询(keys ) (7)判断是否存在(exists) 1 代表存在,0 代表不存在 (8)重命名(rename) (9)过期时间/验证码( expire) (10)查询过期时间还有几秒(ttl) (-1 表示永久,-2 表示已经过期,num3 就不存在了) (11)在创建时设置过期时间(ex) (12)将元素过期时间内设置为永久的(persist) (persist 是将元素设置为永久,-1 表示永久) (13)查看类型(type) (string 表示字符串) (14)删除(del) (15)删除指定元素 redis 暂时不支持删除指定元素,所以我们会返回终端,进行索引查找出后进行删除。 (16)清空所有数据库(flushall) 1.字符串 (1)追加(append) (2)加(incrby) (3)减(decrby) 2.列表 (2)队列(rpush) (3)查询(lrange) 查询时必须跟上索引值,查询全部可用 0 -1 。 (5)长度(llen) (6)索引(lindex) (7)左删除(lpop) (8)右删除(rpop) (9)移除多个元素(lrem) 左移除数值为正(移除两个 a ): 右移除数值为负(移除两个 a ): 移除所有数值为 0 3.哈希类型(hash) 我们现在已经知道Redis是采用字典结构以键值对的形式存储数据的,而散列类型(hash)的键值也是一种字典结构,其存储了字段(field)和字段值的映射,但字段值只能是字符串,不支持其他数据类型,换句话说,散列类型不能嵌套其他的数据类型。一个散列类型键可以包含至多232?1个字段。 (1)设置(hset) (2)获取(hget) (3)设置多个(hmset) (4)获取多个(hmget) (5)获取所有 key(hkeys) (6)获取所有 values (hvals) (7)获取所有 key 和 values (hgetall) (8)判断是否存在(hexists) 哈希类型就是在 redis 原有基础之上开头加上 h ,包括加减或删除之类,多不概述。 4.集合(set) (1)添加(sadd) (2)查看(smembers) (3)查看元素个数(scard) (4)删除元素(srem) (5)随机删除元素(spop) (6)判断元素是否存在(sismember) (7)随机获取元素(srandmember) 随机获取元素个数若为正数,则表示随机获取不重复元素,若个数为负数,则表示随机获取重复元素。 若获取个数为正数,则获取不重复元素 若获取个数为负数,则获取重复元素 (8)交集(sinter) (9)寻找交集并保存在一个新集合中(sinterstore) 将 sel 和 se2 的交集保存在 se3 中 (10)并集(sunion) (11)寻找并集并保存(sunionstore) (12)差集(sdiff) (13)寻找差集并保存(sdiffstore) 5.有序集合(zset) (1)添加(zadd) (2)查看(zscore) (3)查看所有(zrange) 从小到大 从大到小 包含分数 (4)删除(zrem) (5)获取一定范围的分数(zrangebyscore) 括号表示不包含的意思 (6)分页(limit) (7)获取指定分数范围的元素个数(zcount) (8)增加分数(zincrby) (9)按排名顺序删除(ZREMRANGEBYRANK) (10)按分数范围删除元素() (11)交集并保存(zinterstore) (并集ZUNIONSTORE与上文用法相同)一.使用
redis-server
redis-cli -h 127.0.0.1 -p 6379
redis-cli
输入PING(规范是大写,但小写也可以),如果出来的是PONG,则连接正常。127.0.0.1:6379> SELECT 3
OK
二.基本命令
127.0.0.1:6379> set sum 1
OK
127.0.0.1:6379> mset num1 111 num2 222
OK
127.0.0.1:6379> get sum
"1"
127.0.0.1:6379> mget num1 num2
1) "num2"
2) "222"
127.0.0.1:6379> keys *
1) "num1"
2) "num2"
3) "sum"
127.0.0.1:6379> keys num?
1) "num1"
2) "num2"
127.0.0.1:6379> exists sum
(integer) 1
127.0.0.1:6379> exists sum3
(integer) 0
127.0.0.1:6379> rename sum num3
OK
127.0.0.1:6379> expire num3 20
(integer) 1
127.0.0.1:6379> ttl num3
(integer) 11
127.0.0.1:6379> ttl num3
(integer) 8
127.0.0.1:6379> ttl num3
(integer) 6
127.0.0.1:6379> ttl num3
(integer) 3
127.0.0.1:6379> ttl num3
(integer) 1
127.0.0.1:6379> ttl num3
(integer) -2
127.0.0.1:6379> set num3 333 ex 60
OK
127.0.0.1:6379> expire num1 60
(integer) 1
127.0.0.1:6379> persist num1
(integer) 1
127.0.0.1:6379> ttl num1
(integer) -1
127.0.0.1:6379> set num3 333
OK
127.0.0.1:6379> type num3
string
127.0.0.1:6379> del num3
(integer) 1
(py3env) bd@DF:~$ redis-cli keys 'num?' | xargs redis-cli del
(integer) 2
127.0.0.1:6379[1]> flushall
OK
三.数据类型
127.0.0.1:6379> get num1
"1"
127.0.0.1:6379> append num1 2
(integer) 2
127.0.0.1:6379> get num1
"12"
127.0.0.1:6379> get num1
"12"
127.0.0.1:6379> incrby num1 10
(integer) 22
127.0.0.1:6379> get num1
"22"
127.0.0.1:6379> decrby num1 12
(integer) 10
127.0.0.1:6379> get num1
"10"
(1)栈(lpush)
栈 就表示数字从左边进入一个管道,如果先添加 3,再添加 2 ,最后添加 1 ,那么先出来的一定是 1 ,之后是 2 ,再是 3 。127.0.0.1:6379> lpush li 6 5 4
(integer) 3
127.0.0.1:6379> lrange li 0 2
1) "4"
2) "5"
3) "6"
队列则表示数字从右边进入管道,如果先添加 5 ,再添加 6 ,那么先出来的是 6 ,后是 5 。127.0.0.1:6379> rpush li 2 1
(integer) 5
127.0.0.1:6379> lrange li 0 -1
1) "4"
2) "5"
3) "6"
4) "2"
5) "1"
127.0.0.1:6379> lrange li 0 -1
1) "4"
2) "5"
3) "6"
4) "2"
5) "1"
127.0.0.1:6379> llen li
(integer) 5
127.0.0.1:6379> lindex li 3
"2"
127.0.0.1:6379> lpop li
"4"
127.0.0.1:6379> rpop li
"1"
127.0.0.1:6379> lrange li 0 -1
1) "5"
2) "6"
3) "2"
127.0.0.1:6379> lrange li 0 -1
1) "a"
2) "a"
3) "a"
4) "a"
5) "5"
6) "6"
7) "a"
8) "a"
9) "a"
10) "a"
127.0.0.1:6379> lrem li 2 a
(integer) 2
127.0.0.1:6379> lrange li 0 -1
1) "a"
2) "a"
3) "5"
4) "6"
5) "a"
6) "a"
7) "a"
8) "a"
127.0.0.1:6379> lrem li -2 a
(integer) 2
127.0.0.1:6379> lrange li 0 -1
1) "a"
2) "a"
3) "5"
4) "6"
5) "a"
6) "a"
127.0.0.1:6379> lrem li 0 a
(integer) 4
127.0.0.1:6379> lrange li 0 -1
1) "5"
2) "6"
127.0.0.1:6379> hset yige name yige
(integer) 1
127.0.0.1:6379> hset yige age 16
(integer) 1
127.0.0.1:6379> hget yige name
"yige"
127.0.0.1:6379> hget yige age
"16"
127.0.0.1:6379> hmset yige id 2 class 56
OK
127.0.0.1:6379> hmget yige id class
1) "2"
2) "56"
127.0.0.1:6379> hkeys yige
1) "name"
2) "age"
3) "height"
4) "width"
5) "id"
6) "class"
127.0.0.1:6379> hvals yige
1) "yige"
2) "16"
3) "180"
4) "120"
5) "2"
6) "56"
127.0.0.1:6379> hgetall yige
1) "name"
2) "yige"
3) "age"
4) "16"
5) "height"
6) "180"
7) "width"
8) "120"
9) "id"
10) "2"
11) "class"
12) "56"
127.0.0.1:6379> hexists yige name
(integer) 1
127.0.0.1:6379> sadd sel 1 2 3 a b
(integer) 5
127.0.0.1:6379> smembers sel
1) "3"
2) "a"
3) "2"
4) "1"
5) "b"
127.0.0.1:6379> scard sel
(integer) 5
127.0.0.1:6379> srem sel 2
(integer) 1
127.0.0.1:6379> smembers sel
1) "a"
2) "1"
3) "b"
4) "3"
127.0.0.1:6379> spop sel 3
1) "3"
2) "b"
3) "1"
127.0.0.1:6379> smembers sel
1) "a"
127.0.0.1:6379> SISMEMBER sel 1
(integer) 0
127.0.0.1:6379> smembers sel
1) "4"
2) "b"
3) "a"
4) "2"
5) "1"
6) "3"
127.0.0.1:6379> srandmember sel 3
1) "b"
2) "2"
3) "3"
127.0.0.1:6379> srandmember sel -3
1) "b"
2) "4"
3) "b"
127.0.0.1:6379> SMEMBERS sel
1) "4"
2) "b"
3) "a"
4) "2"
5) "1"
6) "3"
127.0.0.1:6379> SMEMBERS se2
1) "a"
2) "2"
3) "1"
4) "b"
5) "c"
6) "d"
127.0.0.1:6379> sinter sel se2
1) "b"
2) "a"
3) "2"
4) "1"
127.0.0.1:6379> SINTERSTORE se3 sel se2
(integer) 4
127.0.0.1:6379> SMEMBERS se3
1) "b"
2) "a"
3) "1"
4) "2"
127.0.0.1:6379> sunion sel se2
1) "4"
2) "c"
3) "b"
4) "a"
5) "d"
6) "2"
7) "1"
8) "3"
将 sel 和 se2 的交集保存在 se4 中127.0.0.1:6379> SUNIONSTORE se4 sel se2
(integer) 8
127.0.0.1:6379> SMEMBERS se4
1) "4"
2) "c"
3) "b"
4) "a"
5) "d"
6) "2"
7) "1"
8) "3"
差集之间是有区别的,他会把第一个集合与第二个集合重复的元素删掉,留下第一个集合中不重复元素127.0.0.1:6379> SMEMBERS sel
1) "4"
2) "b"
3) "a"
4) "2"
5) "1"
6) "3"
127.0.0.1:6379> SMEMBERS se2
1) "a"
2) "2"
3) "1"
4) "b"
5) "c"
6) "d"
127.0.0.1:6379> sdiff sel se2
1) "3"
2) "4"
127.0.0.1:6379> sdiff se2 sel
1) "c"
2) "d"
127.0.0.1:6379> SDIFFSTORE se5 sel se2
(integer) 2
127.0.0.1:6379> SDIFFSTORE se5 se2 sel
(integer) 2
127.0.0.1:6379> zadd math 100 yige 90 liangge 80 sange 70 sige
(integer) 4
127.0.0.1:6379> zscore math yige
"100"
127.0.0.1:6379> zscore math liangge
"90"
127.0.0.1:6379> zrange math 0 -1
1) "sige"
2) "sange"
3) "liangge"
4) "yige"
127.0.0.1:6379> ZREVRANGE math 0 -1
1) "yige"
2) "liangge"
3) "sange"
4) "sige"
127.0.0.1:6379> ZREVRANGE math 0 -1 withscores
1) "yige"
2) "100"
3) "liangge"
4) "90"
5) "sange"
6) "80"
7) "sige"
8) "70"
127.0.0.1:6379> zrem math sige
(integer) 1
127.0.0.1:6379> ZREVRANGE math 0 -1 withscores
1) "yige"
2) "100"
3) "liangge"
4) "90"
5) "sange"
6) "80"
127.0.0.1:6379> ZRANGEBYSCORE math 80 90
1) "sange"
2) "liangge"
127.0.0.1:6379> ZRANGEBYSCORE math 80 (90
1) "sange"
127.0.0.1:6379> ZRANGEBYSCORE math (80 90
1) "liangge"
127.0.0.1:6379> ZRANGEBYSCORE math 70 100
1) "sange"
2) "liangge"
3) "yige"
127.0.0.1:6379> ZRANGEBYSCORE math 70 100 limit 0 2
1) "sange"
2) "liangge"
127.0.0.1:6379> ZCOUNT math 70 100
(integer) 3
127.0.0.1:6379> ZINCRBY math 5 sange
"85"
127.0.0.1:6379> zrange test 0 -1
1) "a"
2) "b"
3) "c"
4) "d"
5) "e"
6) "f"
127.0.0.1:6379> ZREMRANGEBYRANK test 0 2
(integer) 3
127.0.0.1:6379> zrange test 0 -1
1) "d"
2) "e"
3) "f"
127.0.0.1:6379> zrange test 0 -1
1) "a"
2) "b"
3) "c"
4) "d"
5) "e"
6) "f"
127.0.0.1:6379> ZREMRANGEBYSCORE test 3 5
(integer) 3
127.0.0.1:6379> zrange test 0 -1
1) "a"
2) "b"
3) "f"
127.0.0.1:6379> zrange test 0 -1
1) "a"
2) "b"
3) "f"
127.0.0.1:6379> zrange test1 0 -1
1) "a"
2) "b"
3) "c"
4) "d"
5) "e"
127.0.0.1:6379> ZINTERSTORE test2 2 test test1
(integer) 2
127.0.0.1:6379> zrange test2 0 -1
1) "a"
2) "b"