DEL key1 key2 ... keyN
Remove the specified keys. If a given key does not exist no operation is performed for this key. The commnad returns the number of keys removed.
TIME COMPLEXITY: O(1)
RETURN VALUE: An integer greater than 0 if one or more keys were removed. 0 if none of the specified keys existed.
Syntax:
DEL key1 key2 .. keyN
Example 1: When the keys are present.
redis:6379> DEL redisKey redisKey1 redisKey2(integer) 3
Output
3
Example 2: When no keys are present.
redis:6379> DEL redisKey redisKey1 redisKey2(integer) 0
Output
0
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