Menu
Let's say I have a database with 1,000,000 keys. Is there a way to know the last 10 keys from that database?
944
To list the keys in the Redis data store, use the KEYS command followed by a specific pattern. Redis will search the keys for all the keys matching the specified pattern. In our example, we can use an asterisk (*) to match all the keys in the data store to get all the keys.
The first command you can use to get the total number of keys in a Redis database is the DBSIZE command. This simple command should return the total number of keys in a selected database as an integer value. The above example command shows that there are 203 keys in the database at index 10.
The Redis KEYS command returns all the keys in the database that match a pattern (or all the keys in the key space). Similar commands for fetching all the fields stored in a hash is HGETALL and for all fetching the members of a SMEMBERS. The keys in Redis themselves are stored in a dictionary (aka a hash table).
Redis Get List Items. To get elements in a Redis, use the LRANGE command. This command takes the name of the list and the index range of the element you wish to access. The command should return the values of the elements in the specified range.
You will need to maintain it as another list using the following commands.
Add new key to the front of the list
LPUSH last10keys key
Retain only the last 10
LTRIM last10keys 0 9
Get the last keys - will return 10 or less
LRANGE mylist 0 9
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
