Redis学习-03 String命令详解

• 查看key的类型 127.0.0.1:6379[2]> type phone
• 查看key所对应的value值的长度127.0.0.1:6379> strlen age
• 127.0.0.1:6379> incr views
• 127.0.0.1:6379> decr views
• 127.0.0.1:6379> incrby views 10
• 127.0.0.1:6379> decrby views 2
• 127.0.0.1:6379> getrange key1 0 3

• 127.0.0.1:6379> setrange key1 1 xxx

• 127.0.0.1:6379> setex key3 30 hello
• 127.0.0.1:6379> ttl key3
• 127.0.0.1:6379> setnx mykey "redis"

• 127.0.0.1:6379> setnx mykey "MongoDB"
  (integer) 0
  127.0.0.1:6379> get mykey
  "redis"

• 127.0.0.1:6379> mset k1 v1 k2 v2 k3 v3
  OK

• 127.0.0.1:6379> mget k1 k2 k3
  1) "v1"
  2) "v2"
  3) "v3"

• 127.0.0.1:6379> msetnx k1 v1
  (integer) 0

• 127.0.0.1:6379> mget k1 k2 k3 k4
  1) "v1"
  2) "v2"
  3) "v3"
  4) (nil)
  127.0.0.1:6379> get k4
  (nil)
  127.0.0.1:6379> mset user:1:name zhangsan user:1:age 2
  OK
  127.0.0.1:6379> mget user:1:name user:1:age
  1) "zhangsan"
  2) "2"
  127.0.0.1:6379> getset db redis
  (nil)
  127.0.0.1:6379> get db
  "redis"
  127.0.0.1:6379> getset db mongodb
  "redis"
  127.0.0.1:6379> get db
  "mongodb"
  127.0.0.1:6379> getset db hbase
  "mongodb"