stirng
Set string type data
set key value
Get the value corresponding to the key
get key
Get the substring of the string corresponding to the key (start to end subscripts start from 0, if end is greater than the length, the last character is returned by default, end=-1 means the end is the last character)
getrange key start end
Get the value of multiple keys
mget key1 key2 key3 ...
Returns the length of the string corresponding to key
strlen key
Set multiple key-value pairs
mset key1 value1 key2 value2 ...
Add one to value (value must be a number, if not, return an error message)
incr key
add increment to value
inyrbr key increment
subtract one from value
decr key
Subtract a number from value
decrby key increment
String append (append to the end of the original string)
append key value (value为要追加的字符串）
hash
Create hash data
hmset key filed1 value1
Get all fields and values in the specified hash table
hgetall key
Get the value of the specified field stored in the hash table
hget key filed
Delete one or more hash table fields
hdel key filed1 filed2 ...
Get the number of fields in a hash table
hlen key
Get all fields in hash table
hkeys key
Get all the values in the hash table
hvals key
list
Insert elements at the head of the list (each element is placed at the front of the current, similar to the head insertion method)
lpush key value1 value2 ....
Insert elements at the end of the list (each element is placed at the end of the current, similar to tail insertion)
rpush key value1 value2 ...
get list length
llen key
Get the element with the specified subscript (subscript starts from 0)
lindex key index