[redis] 获得 database, key, value
获得 database
The INFO KEYSPACE
command can be used to check whether some keys are defined in several databases.
redis 127.0.0.1:6379[1]> info keyspace
# Keyspace
db0:keys=1,expires=0
db1:keys=1,expires=0
The SELECT
command can be used to switch a session to another database.The SELECT command can be used to switch a session to another database.
redis 127.0.0.1:6379> select 1
OK
redis 127.0.0.1:6379[1]> keys *
1) "bar"
获取所有的 key
keys *
,*
是通配符
http://redis.io/commands/keyshttp://redis.io/commands/keys
获取 key 的 value
因为 redis 有多种数据类型,并且每种类型的取值方法不同,所有首先需要知道 key 存储的 value 类型
You will need to perform for each key a type
and depending on the response perform:
- for “string”: get
- for “hash”: hgetall
- for “list”: lrange 0 -1
- for “set”: smembers
- for “zset”: zrange 0 -1 withscores
Keep in mind that for hashes and sorted sets you will be getting the keys/scores and values.
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