How to Delete Records in Redis

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The DEL command can delete one to multiple key/value pairs, it also returns how many elements were deleted, as shown below:

127.0.0.1:6379> SET first_name "Jordan"
OK
127.0.0.1:6379> SET last_name "Hudgens"
OK
127.0.0.1:6379> SET middle_name "David"
OK
127.0.0.1:6379> DEL first_name last_name
(integer) 2
127.0.0.1:6379> GET first_name
(nil)
127.0.0.1:6379> GET last_name
(nil)
127.0.0.1:6379> GET middle_name
"David"
127.0.0.1:6379> DEL middle_name
(integer) 1