峰Redis学习（7）Redis 之Keys 通用操作

keys * 显示所有key

 

查找所有以s开头的key

用s*  *代表任意字符

127.0.0.1:6379> keys s*
1) "set3"
2) "sort1"
3) "set2"
4) "set1"
127.0.0.1:6379> keys s*1
1) "sort1"
2) "set1"

查找所有s开头 后面紧跟任意一个字符的key

127.0.0.1:6379> keys s?
1) "s1"

del删除key

 

 

exists判断key是否存在 1表示存在  0表示不存在

127.0.0.1:6379> exists s1
(integer) 1
127.0.0.1:6379> exists asdasd
(integer) 0

get获取元素

127.0.0.1:6379> lrange list1 0 -1
1) "b"
2) "a"
127.0.0.1:6379> get list1
(error) WRONGTYPE Operation against a key holding the wrong kind of value
127.0.0.1:6379> get s1
"123456"

rename对key重命名

127.0.0.1:6379> get s1
"123456"
127.0.0.1:6379> rename s1 s1_new
OK
127.0.0.1:6379> get s1_new
"123456"
127.0.0.1:6379> get s1
(nil)

expire 设置n2 有效时间

ttl查看剩余时间

127.0.0.1:6379> expire s1_new 120
(integer) 1
127.0.0.1:6379> ttl s1_new
(integer) 113

type显示类型

127.0.0.1:6379> type name
string
127.0.0.1:6379> type list2
list
127.0.0.1:6379> type set3
set
127.0.0.1:6379> type sort1
zset
127.0.0.1:6379> type r1
set
127.0.0.1:6379> type student
hash