数据库 发布日期:2024/12/23 浏览次数:1
Redis中五种数据类型简单操作
提出问题
Redis五种数据类型的简单增删改查命令???
解决问题
假设你已经安装Redis服务器;
假设你已经打开Redis cli命令行工具;
假设你对Redis有所了解;
Redis简单增删改查例子
例一:字符串的增删改查
#增加一个key为ay_key的值 127.0.0.1:6379> set ay_key "ay" OK #查询ay_key的值 127.0.0.1:6379> get ay_key "ay" #修改ay_key的值 127.0.0.1:6379> set ay_key "new_ay" OK 127.0.0.1:6379> get ay_key "new_ay" #修改ay_key名称 127.0.0.1:6379> rename ay_key new_ay_key OK 127.0.0.1:6379> keys * 1) "new_ay_key" #删除ay_key 127.0.0.1:6379> del ay_key (integer) 0 #查询是否存在ay_key 0 127.0.0.1:6379> exists ay_key (integer) 0
例二:Set集合的增删改查
#删除当前选择数据库中的所有key 127.0.0.1:6379> flushdb OK #生成set集合,添加4个数据 127.0.0.1:6379> sadd set_ay_key "ay" "al" "xy" "xl" (integer) 4 #查询set里面所有值 127.0.0.1:6379> smembers set_ay_key 1) "xy" 2) "al" 3) "ay" 4) "xl" #删除value为"xl" , 返回 1 如果没有返回 0 127.0.0.1:6379> srem set_ay_key "xl" (integer) 1 127.0.0.1:6379> smembers set_ay_key 1) "xy" 2) "al" 3) "ay" #添加value为"xl" 127.0.0.1:6379> sadd set_ay_key "xl" (integer) 1 127.0.0.1:6379> smembers set_ay_key 1) "xy" 2) "al" 3) "ay" 4) "xl" #添加value为"xl" 添加不进去,但也不报错,set是不允许重复的 127.0.0.1:6379> sadd set_ay_key "xl" (integer) 0 #不多解释 127.0.0.1:6379> sadd set_ay_key "xl" (integer) 0 #不多解释 127.0.0.1:6379> sadd set_ay_key "xl" (integer) 0
例三:List集合的增删改查
#添加key为list_ay_key的list集合 127.0.0.1:6379> lpush list_ay_key "ay" "al" "xy" "xl" (integer) 4 #查询key为list_ay_key的集合 127.0.0.1:6379> lrange list_ay_key 0 -1 1) "xl" 2) "xy" 3) "al" 4) "ay" #往list尾部添加元素 127.0.0.1:6379> rpush list_ay_key "together" (integer) 5 #往list头部添加元素 127.0.0.1:6379> lpush list_ay_key "first" (integer) 6 #查询list集合 127.0.0.1:6379> lrange list_ay_key 0 -1 1) "first" 2) "xl" 3) "xy" 4) "al" 5) "ay" 6) "together" #更新index为0的值 127.0.0.1:6379> lset list_ay_key 0 "update_first" OK 127.0.0.1:6379> lrange list_ay_key 0 -1 1) "update_first" 2) "xl" 3) "xy" 4) "al" 5) "ay" 6) "together" #删除index为1上的值 127.0.0.1:6379> lrem list_ay_key 1 "update_first" (integer) 1 127.0.0.1:6379> lrange list_ay_key 0 -1 1) "xl" 2) "xy" 3) "al" 4) "ay" 5) "together"
例四:Hash集合(类似Java)的增删改查
127.0.0.1:6379> flushdb OK #生成hash集合,并添加key 为uuid_one value 为"12345" 127.0.0.1:6379> hset hash_ay_key "uuid_one" "12345" (integer) 1 127.0.0.1:6379> hlen hash_ay_key (integer) 1 #返回集合所有的key 127.0.0.1:6379> hkeys hash_ay_key 1) "uuid_one" #返回集合所有value 127.0.0.1:6379> hvals hash_ay_key 1) "12345" #集合添加值 127.0.0.1:6379> hset hash_ay_key "uuid_two" "22222" (integer) 1 #集合添加值 127.0.0.1:6379> hset hash_ay_key "uuid_three" "33333" (integer) 1 #获得key为uuid_one的值 127.0.0.1:6379> hget hash_ay_key uuid_one "12345" #删除key为uuid_three的值 127.0.0.1:6379> hdel hash_ay_key uuid_three (integer) 1 127.0.0.1:6379> hkeys hash_ay_key 1) "uuid_one" 2) "uuid_two" #获得所有,包括key和value 127.0.0.1:6379> hgetall hash_ay_key 1) "uuid_one" 2) "12345" 3) "uuid_two" 4) "22222" #更新key为uuid_one的值 127.0.0.1:6379> hset hash_ay_key uuid_one "11111" (integer) 0 127.0.0.1:6379> hset hash_ay_key "uuid_one" "11111" (integer) 0 127.0.0.1:6379> hgetall hash_ay_key 1) "uuid_one" 2) "11111" 3) "uuid_two" 4) "22222"
例五:SortedSet集合的增删改查
SortedSet是有序的set集合
#sorted set添加值ay 排序值为 1 127.0.0.1:6379> zadd zset_ay_key 1 "ay" (integer) 1 127.0.0.1:6379> zadd zset_ay_key 2 "al" (integer) 1 127.0.0.1:6379> zadd zset_ay_key 3 "xy" (integer) 1 127.0.0.1:6379> zadd zset_ay_key 4 "xl" (integer) 1 #查询所有的值 127.0.0.1:6379> zrange zset_ay_key 0 -1 1) "ay" 2) "al" 3) "xy" 4) "xl" #删除所有的值 127.0.0.1:6379> zrem zet_ay_key "xl" (integer) 0 127.0.0.1:6379> zrange zset_ay_key 0 -1 1) "ay" 2) "al" 3) "xy" 4) "xl"
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