SET

Syntax

SET key value

Description

The SET command stores a string value associated with a key. If the key already exists, the value is overwritten. The key can hold any string value, including binary data.

Arguments

• key (required): The name of the key to set.
• value (required): The string value to store.

Return Value

Returns a Simple String: OK on success.

Examples

Basic SET

SET username "john_doe"

Response:

OK

Setting a Value

SET mykey "Hello ECHO DB"
GET mykey

Response:

OK
"Hello ECHO DB"

Overwriting an Existing Key

SET mykey "first value"
SET mykey "second value"
GET mykey

Response:

OK
OK
"second value"

Notes

• If the key already exists, the previous value is replaced
• Keys can store any string value, including binary data
• Keys are case-sensitive
• There is no limit on the size of the value (subject to available memory)

Use Cases

• Caching: Store cached values for fast retrieval
• Configuration: Store configuration strings
• Session Data: Store session information
• Simple Key-Value Storage: Basic data storage

Related Commands

• GET - Get the value of a key
• DEL - Delete a key
• EXISTS - Check if a key exists