redis中value/hush

无hash时，用键值对

set six::name "6"

get six::name 

set six::age 18

get six::age

keys six *        ==>        six::name six::age 

有hash时

hset six name yyds

hmset six age 18 address bj

hget six name        "yyds"

hget six age        "18"

hmget six name age        "yyds" "18"

hkeys six        "name" "age" "address"

hvals six        "yyds" "18" "bj"

hgetall six        "name" "yyds" "age" "18" "address" "bj"

hincrbyfloat six age 0.5

hget six age        "18.5" 

hincrbyfloat six age -1

hget six age        "17.5"