How to delete the contents of hash table in redis

hash:

Redis hash is a mapping table of string type fields and values. Hash is particularly suitable for storing objects.

Each hash in Redis can store 232-1 key-value pairs (more than 4 billion).

Instance:

127.0.0.1:6379>  HMSET runoobkey name "redis tutorial" description "redis basic commands for caching" likes 20
 visitors 23000
OK
127.0.0.1:6379>  HGETALL runoobkey
1) "name"
2) "redis tutorial"
3) "description"
4) "redis basic commands for caching"
5) "likes"
6) "20"
7) "visitors"
8) "23000"

Delete command:

Hdel command

The Redis Hdel command is used to delete one or more keys in the hash table specified fields, non-existing fields will be ignored.

The basic syntax of the redis Hdel command is as follows:

redis 127.0.0.1:6379> HDEL KEY_NAME FIELD1.. FIELDN

Return value:

The number of successfully deleted fields, excluding ignored fields.

redis 127.0.0.1:6379> HSET myhash field1 "foo"
(integer) 1
redis 127.0.0.1:6379> HDEL myhash field1
(integer) 1
redis 127.0.0.1:6379> HDEL myhash field2
(integer) 0

For more Redis related knowledge, please visit the Redis usage tutorial column!

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