To view all keys in Redis, there are three ways: use the KEYS command to return all keys that match the specified pattern; use the SCAN command to iterate over the keys and return a set of keys; use the INFO command to get the total number of keys.
How to view all keys in Redis
Redis is a popular in-memory database that uses key-value pairs to store data. To view all keys in Redis, follow these steps:
Method 1: Use the KEYS command
The KEYS command returns all keys in the Redis database that match the specified pattern. To view all keys, just run the following command:
<code>KEYS *</code>
Method 2: Use the SCAN command
The SCAN command iterates over keys in the Redis database and returns a set of keys. To view all keys, use the following command:
<code>SCAN 0</code>
This returns an iterator with cursor number 0. To get the next set of keys, use the following command:
<code>SCAN 0</code>
Repeat this command until the cursor is 0, indicating that all keys have been retrieved.
Method 3: Use the info command
The INFO command can provide information about Redis instances, including the number of keys that have been used. To view the total number of keys, run the following command:
<code>INFO KEYSSPACE</code>
In the output, look for "keys=
Notice:
- If there are a large number of keys in the Redis database, using the KEYS command can cause performance problems. In this case, it is recommended to use the SCAN command.
- You can also use external tools or libraries such as RedisInsight to view keys in Redis.
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