Redis 命令 - Strings

APPEND key value

Available since 2.0.0, Time complexity: O(1).

Append a value to a key

127.0.0.1:6379> SET foo hello

OK

127.0.0.1:6379> APPEND foo world

(integer) 10

127.0.0.1:6379> GET foo

"helloworld"

127.0.0.1:6379> APPEND bar hello

(integer) 5

127.0.0.1:6379> GET bar

"hello"

More: http://redis.io/commands/append, http://www.redis.cn/commands/append.html

BITCOUNT key [start end]

Count set bits in a string

127.0.0.1:6379> SET foo hello

OK

127.0.0.1:6379> BITCOUNT foo

(integer) 21

More: http://redis.io/commands/bitcount, http://www.redis.cn/commands/bitcount.html

BITOP operation destkey key [key ...]

Perform bitwise operations between strings

127.0.0.1:6379> SET key1 aba

OK

127.0.0.1:6379> SET key2 abb

OK

127.0.0.1:6379> BITOP OR dest key1 key2

(integer) 3

127.0.0.1:6379> GET dest

"abc"

More: http://redis.io/commands/bitop, http://www.redis.cn/commands/bitop.html

BITPOS key bit [start] [end]

Find first bit set or clear in a string

127.0.0.1:6379> SET foo "\xff\xf0\x00"

OK

127.0.0.1:6379> BITPOS foo 0

(integer) 12

127.0.0.1:6379> SET foo "\x00\xff\xf0"

OK

127.0.0.1:6379> BITPOS foo 1

(integer) 8

More: http://redis.io/commands/bitpos

DECR key

Decrement the integer value of a key by one

127.0.0.1:6379> SET foo 10

OK

127.0.0.1:6379> DECR foo

(integer) 9

127.0.0.1:6379> DECR foo

(integer) 8

127.0.0.1:6379> DECR bar

(integer) -1

More: http://redis.io/commands/decr, http://www.redis.cn/commands/decr.html

DECRBY key decrement

Decrement the integer value of a key by the given number

127.0.0.1:6379> SET foo 10

OK

127.0.0.1:6379> DECRBY foo 3

(integer) 7

127.0.0.1:6379> DECRBY foo 4

(integer) 3

More: http://redis.io/commands/decrby, http://www.redis.cn/commands/decrby.html

GET key

Get the value of a key

127.0.0.1:6379> GET foo

(nil)

127.0.0.1:6379> SET foo hello

OK

127.0.0.1:6379> GET foo

"hello"

More: http://redis.io/commands/get, http://www.redis.cn/commands/get.html

GETBIT key offset

Returns the bit value at offset in the string value stored at key

# binary of code a's ASCII is 01100001

127.0.0.1:6379> SET foo a

OK

127.0.0.1:6379> GETBIT foo 0

(integer) 0

127.0.0.1:6379> GETBIT foo 1

(integer) 1

127.0.0.1:6379> GETBIT foo 2

(integer) 1

127.0.0.1:6379> GETBIT foo 3

(integer) 0

127.0.0.1:6379> GETBIT foo 4

(integer) 0

127.0.0.1:6379> GETBIT foo 5

(integer) 0

127.0.0.1:6379> GETBIT foo 6

(integer) 0

127.0.0.1:6379> GETBIT foo 7

(integer) 1

More: http://redis.io/commands/getbit, http://www.redis.cn/commands/getbit.html

GETRANGE key start end

Get a substring of the string stored at a key

127.0.0.1:6379> SET foo helloworld

OK

127.0.0.1:6379> GETRANGE foo 0 3

"hell"

127.0.0.1:6379> GETRANGE foo 3 5

"low"

127.0.0.1:6379> GETRANGE foo 5 -1

"world"

More: http://redis.io/commands/getrange, http://www.redis.cn/commands/getrange.html

GETSET key value

Set the string value of a key and return its old value

127.0.0.1:6379> SET foo hello

OK

127.0.0.1:6379> GETSET foo world

"hello"

127.0.0.1:6379> GET foo

"world"

More: http://redis.io/commands/getset, http://www.redis.cn/commands/getset.html

INCR key

Increment the integer value of a key by one

127.0.0.1:6379> SET foo 10

OK

127.0.0.1:6379> INCR foo

(integer) 11

127.0.0.1:6379> INCR foo

(integer) 12

127.0.0.1:6379> INCR bar

(integer) 1

More: http://redis.io/commands/incr, http://www.redis.cn/commands/incr.html

INCRBY key increment

Increment the integer value of a key by the given amount

127.0.0.1:6379> SET foo 10

OK

127.0.0.1:6379> INCRBY foo 2

(integer) 12

127.0.0.1:6379> INCRBY foo 3

(integer) 15

127.0.0.1:6379> INCRBY bar 4

(integer) 4

More: http://redis.io/commands/incrby, http://www.redis.cn/commands/incrby.html

INCRBYFLOAT key increment

Increment the float value of a key by the given amount

127.0.0.1:6379> SET foo 10

OK

127.0.0.1:6379> INCRBYFLOAT foo 2.3

"12.3"

127.0.0.1:6379> INCRBYFLOAT foo 5.8E2

"592.29999999999999999"

127.0.0.1:6379>

127.0.0.1:6379> INCRBYFLOAT bar 3.33

"3.33"

More: http://redis.io/commands/incrbyfloat, http://www.redis.cn/commands/incrbyfloat.html

MGET key [key ...]

Get the values of all the given keys

127.0.0.1:6379> SET foo hello

OK

127.0.0.1:6379> SET bar world

OK

127.0.0.1:6379> MGET foo bar

1) "hello"

2) "world"

More: http://redis.io/commands/mget, http://www.redis.cn/commands/mget.html

MSET key value [key value ...]

Set multiple keys to multiple values

127.0.0.1:6379> MSET foo hello bar world

OK

127.0.0.1:6379> MGET foo bar

1) "hello"

2) "world"

More: http://redis.io/commands/mset, http://www.redis.cn/commands/mset.html

MSETNX key value [key value ...]

Set multiple keys to multiple values, only if none of the keys exist

127.0.0.1:6379> SET foo hello

OK

127.0.0.1:6379> MSETNX foo world bar world

(integer) 0

127.0.0.1:6379> MGET foo bar

1) "hello"

2) (nil)

More: http://redis.io/commands/msetnx, http://www.redis.cn/commands/msetnx.html

PSETEX key milliseconds value

Set the value and expiration in milliseconds of a key

127.0.0.1:6379> PSETEX foo 10000 hello

OK

127.0.0.1:6379> PTTL foo

(integer) 8404

127.0.0.1:6379> GET foo

"hello"

127.0.0.1:6379> PTTL foo

(integer) -2

127.0.0.1:6379> GET foo

(nil)

More: http://redis.io/commands/psetex, http://www.redis.cn/commands/psetex.html

SET key value [EX seconds] [PX milliseconds] [NX|XX]

Set the string value of a key

127.0.0.1:6379> SET foo hello

OK

127.0.0.1:6379> GET foo

"hello"

More: http://redis.io/commands/set, http://www.redis.cn/commands/set.html

SETBIT key offset value

Sets or clears the bit at offset in the string value stored at key

127.0.0.1:6379> SET foo a

OK

127.0.0.1:6379> GETBIT foo 7

(integer) 1

127.0.0.1:6379> SETBIT foo 7 0

(integer) 1

More: http://redis.io/commands/setbit, http://www.redis.cn/commands/setbit.html

SETEX key seconds value

Set the value and expiration of a key

127.0.0.1:6379> SETEX foo 10 hello

OK

127.0.0.1:6379> TTL foo

(integer) 8

127.0.0.1:6379> GET foo

"hello"

127.0.0.1:6379> TTL foo

(integer) -2

127.0.0.1:6379> GET foo

(nil)

More: http://redis.io/commands/setex, http://www.redis.cn/commands/setex.html

SETNX key value

Set the value of a key, only if the key does not exist

127.0.0.1:6379> SETNX foo hello

(integer) 1

127.0.0.1:6379> GET foo

"hello"

127.0.0.1:6379> SETNX foo world

(integer) 0

127.0.0.1:6379> GET foo

"hello"

More: http://redis.io/commands/setnx, http://www.redis.cn/commands/msetnx.html

SETRANGE key offset value

Overwrite part of a string at key starting at the specified offset

127.0.0.1:6379> SET foo helloworld

OK

127.0.0.1:6379> SETRANGE foo 5 redis

(integer) 10

127.0.0.1:6379> GET foo

"helloredis"

More: http://redis.io/commands/setrange, http://www.redis.cn/commands/setrange.html

STRLEN key

Get the length of the value stored in a key

127.0.0.1:6379> set foo hello

OK

127.0.0.1:6379> STRLEN foo

(integer) 5

More: http://redis.io/commands/strlen, http://www.redis.cn/commands/strlen.html

Redis 命令 - Strings的更多相关文章

常用 redis 命令（for php）
Redis 主要能存储 5 种数据结构,分别是 strings,hashes,lists,sets 以及 sorted sets. 新建一个 redis 数据库 $redis = new Redis( ...
redis命令大全
redis windows下使用及redis命令 Redis 是一个开源,高级的键值对的存储.它经常作为服务端的数据结构,它的键的数据类型能够是strings, hashs, lists, sets( ...
Redis数据类型Strings、Lists常用操作指令
Redis数据类型Strings.Lists常用操作指令 Strings常用操作指令 GET.SET相关操作 # GET 获取键值对 127.0.0.1:6379> get name (nil) ...
Redis命令拾遗二（散列类型）
本文版权归博客园和作者吴双共同所有,欢迎转载,转载和爬虫请注明原文地址 :博客园蜗牛NoSql系列地址 http://www.cnblogs.com/tdws/tag/NoSql/ Redis命令拾 ...
redis命令总结
Redis命令总结 redis 127.0.0.1:6379> info #查看server版本内存使用连接等信息 redis 127.0.0.1:6379> client list ...
redis如何执行redis命令
Redis 命令 Redis 命令用于在 redis 服务上执行操作.所以我们必须要启动Redis服务程序,也就是redis安装目录下的redis-server.exe,你可以双击执行,也可以打开cm ...
Redis命令大全&中文解释&在线测试命令工具&在线中文文档
在线测试命令地址:http://try.redis.io/ 官方文档:http://redis.io/commands http://redis.io/documentation Redis 命令参考 ...
Redis命令
redis的常用命令主要分为两个方面.一个是键值相关命令.一个是服务器相关命令(redis-cli进入终端) 1.键值相关命令 keys * 取出当前所有的key exists name 查看n是否有 ...
redis命令参考
http://doc.redisfans.com/ 进入redis命令行模式方式: 1.进入redis安装目录 2.运行redis-cli

随机推荐

CodeForces 706A Beru-taxi (数学计算，水题)
题意:给定一个固定位置,和 n 个点及移动速度,问你这些点最快到固定点的时间. 析:一个一个的算距离,然后算时间. 代码如下: #pragma comment(linker, "/STACK ...
关于session更新的问题
最近在学习用ssh框架做一个实习生招聘系统,已经做了大半.今天突然想到一个问题,在登录的时候我把用户的所有信息放到session中去,那么我不同用户同时登录的时候session中的信息是否会被覆盖掉( ...
C#学习笔记（十五）：预处理指令
C#和C/C++一样,也支持预处理指令,下面我们来看看C#中的预处理指令. #region 代码折叠功能,配合#endregion使用,如下: 点击后如下: 条件预处理条件预处理可以根据给出的条件决 ...
FloatingActionButton的一点学习感悟
最近在学习android材料设计的新控件,前面一篇文章讲到 CoordinatorLayout 结合几个新控件可以实现的几个效果.其中第一个是,Coordinatorlayout + Floating ...
rxjava各种使用场景
1. 数据的三级缓存 final Observable memory = Observable.create(new Observable.OnSubscribe() { @Override publ ...
php+gd库的源码安装
php+gd库的源码安装 PHP+GD安装一.下载软件 gd-2.0.35.tar.gz http://www.boutell.com/gd/ jpegsrc.v6b. ...
javascript keycode大全【转载】
keycode 8 = BackSpace BackSpace keycode 9 = Tab Tabkeycode 12 = Clearkeycode 13 = Enterkey ...
DataSource , DataSink， DataSourceLoop
Script assertion in login:
UVa297 Quadtrees
// UVa297 Quadtrees // 题意:给两棵四分树的先序遍历,求二者合并之后(黑色部分合并)黑色像素的个数.p表示中间结点,f表示黑色(full),e表示白色(empty) // 算法: ...
瑞丽的SQL-基于窗体的排名计算
在SQL Server中,窗体被定义为用户指定的一组行. 之所以要提出窗体这个概念,由于这种基于窗体或分区的又一次计算在实际工作应用范围比較广泛.比如.假设我们要对每一个班级中的学生按成绩进行排序,在 ...

Redis 命令 - Strings

Redis 命令 - Strings的更多相关文章

随机推荐

热门专题