Redis String: Set key value
Redis SET Command
Redis SET command is used to set some string value in redis key. If the key already holds a value, it is overwritten, regardless of its type. Any previous time to live associated with the key is discarded on a successful SET operation.
Here are some common uses and scenarios for the "SET" command:
- Storing Data: Save strings, numbers, or other serialized data in Redis.
- Cache Values: Store cached data with an optional expiration time.
- Flags and Counters: Use as flags (e.g., feature toggles) or counters by combining with increment/decrement operations.
- Session Storage: Store session data for web applications.
Syntax:
Basic syntax of redis SET command is shown below:
redis 127.0.0.1:6379> SET KEY_NAME VALUE
Available since
1.0.0.
Return Value
Simple string reply. OK, if a value is set to key or Null, if the value does not set.
Return Value Type
String
Example:
redis 127.0.0.1:6379> SET w3resource redis OK
Options
In SET command there are many options available, that modify the behavior of command. Basic syntax of SET command with available options is shown below:
redis 127.0.0.1:6379> SET KEY VALUE [EX seconds] [PX milliseconds] [NX|XX] (integer) 1
- EX seconds - Set the specified expire time, in seconds.
- PX milliseconds - Set the specified expire time, in milliseconds.
- NX - Only set the key if it does not already exist.
- XX - Only set the key if it already exist.
Example:
redis 127.0.0.1:6379> SET w3resource redis EX 60 NX OK
Above example will set the key w3resource, with an expiry of 60 seconds, if the key does not exist.