在redis中删除指定key以及指定key中的元素

in 读书学习 with 0 comment

------------------------删除指定key--------------------------------

 127.0.0.1:6379> keys *
 1) "_kombu.binding.celery.pidbox"
 2) "_kombu.binding.celery"
 3) "_kombu.binding.celeryev"
 4) "key"
 5) "db_number"
 6) "myhash"
 7) "key1"
 8) "data_string"
 9) "data_list"
10) "set1"

127.0.0.1:6379> del key
(integer) 1

127.0.0.1:6379> keys *
1) "_kombu.binding.celery.pidbox"
2) "_kombu.binding.celery"
3) "_kombu.binding.celeryev"
4) "db_number"
5) "myhash"
6) "key1"
7) "data_string"
8) "data_list"
9) "set1"

------------------------list中删除指定元素--------------------------------

127.0.0.1:6379> lrange data_list 0 10显示指定key的数据
1) "test_function"
2) "rabbitmq"
3) "haha"
4) "redis"

127.0.0.1:6379> lrem data_list 0 test_function#删除值为test_function的字符串
(integer) 1显示指定key的数据

127.0.0.1:6379> lrange data_list 0 10显示指定key的数据
1) "rabbitmq"
2) "haha"
3) "redis"

--------------------Hash Key删除键值-------------------------------------------------

127.0.0.1:6379> HGETALL myhash 1) "field1" 2) "Hello" 3) "field2" 4) "World" 
127.0.0.1:6379> HDEL myhash field1 hello (integer) 1 
127.0.0.1:6379> HGETALL myhash 1) "field2" 2) "World"

--------------------------string删除元素------------------------------------------- string类型的key在设置数据的时候,就会覆盖之前的数据,所以等效于删除原有的数据了.

127.0.0.1:6379> set data_string republic
OK
127.0.0.1:6379>  get data_string
"republic"
127.0.0.1:6379> 

------------------------set删除元素-------------------------------------------

127.0.0.1:6379> SMEMBERS set1
1) "mongodb"
2) "redis"
3) "yuchiappleyuchi"
127.0.0.1:6379> SREM  set1 yuchiappleyuchi
(integer) 1
127.0.0.1:6379> SMEMBERS set1
1) "mongodb"
2) "redis"