Home Database Mysql Tutorial Nosql之Redis: string数据类型及操作命令

Nosql之Redis: string数据类型及操作命令

Jun 07, 2016 pm 04:29 PM
nosql redis string Order operate data type

strings 类型 : ? 设置KEY对应的值为STRING类型的value. ? 最简单的数据,是二进制安全的.可以包含任何数据. ? 比如jpg图片或者序列化的对象. ?? 操作: set name value; ?? 2: setnx 设置KEY对应的值为STRING类型的value.如果key已经存存,返回0; 3: setex? 设

strings 类型:
? 设置KEY对应的值为STRING类型的value.
? 最简单的数据,是二进制安全的.可以包含任何数据.
? 比如jpg图片或者序列化的对象.
?? 操作: set name value;
??
2: setnx 设置KEY对应的值为STRING类型的value.如果key已经存存,返回0;

3: setex? 设置KEY对应的值为STRING类型的value.并指定此键值对应的有效期.
?? setex twnmae 10 red;
??
4: setrange 设置指定KEY的value值的子符串.
??
?? setrange name 6 tangwen.org?? 设置从第6个字符开始替换成tangwen.org.

5: mset 一次设置多个KEY的值.成功返回0k,失败返回0;

? mset key1 value1 key2 value2
6:getset
?设置key的新值,并返回key的旧值

7:getrange 获取子字符串.
? getrange name 0,6? 获取下标从0开始到6的字符
8:mget
? 批量获取,对应KEY不存在时则对应返回nil.

9: incr
?? 对KEY的值递增.

10:incrby
? incrby key 5;对key递增5个.
如:
redis 127.0.0.1:6379> set key1 12
OK
redis 127.0.0.1:6379> get key1
“12″
redis 127.0.0.1:6379> incr key1
(integer) 13
redis 127.0.0.1:6379> incrby key1 2
(integer) 15
redis 127.0.0.1:6379>
11: decr 对key的值做减减操作.
12 decrby 同decr类似,减指定值.

13: append 给指定KEY的字符串追加value,返回新字符串值的长度

Nosql之Redis在centos下安装

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