When using the SET
command to set a key in Redis, we can use the GET
option to return its old value. This allows us to update the value of a key while returning the value that we’re replacing it with.
Note that this option was introduced in Redis 7.0.0, so if it doesn’t work, check your Redis version. If using an earlier version, try the GETSET
command instead (which is deprecated from Redis version 6.2.0).