Redis Rename

• Modifying the name of an existing key is a common operation.
• However, there is a massive catch regarding how they handle existing keys, and understanding the difference between RENAME and RENAMENX is crucial to avoiding accidental data loss.

RENAME:
The RENAME command changes the name of a key from oldkey to newkey.

#Syntax
RENAME key newkey

#Example
RENAME Fname FirstName

If newkey already exists, RENAME will overwrite it without warning. The old data stored under newkey will be lost.

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RENAMENX:
The Main advantage of using RENAMENX is, it will only rename the key if newkey does not already exist.

#Syntax
RENAMENX key newkey

#Example
RENAMENX Fname FirstName

If the key was successfully renamed. returns 1.
if it returns 0,newkey already exists (IT will not rename)