Redis common command

Before you can use Redis, you need to install Redis first. For details on how to install Redis, refer to my other article Redis Installation and Use (Windows version).

Operation is the key

View which keys the current library has

keys *
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Remove the key

del key 
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Set the key expiration time

expire key second
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Check that the specified key life cycle has expired. Return -2 Permanent -1

ttl key
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Manipulation library

In Redis, there are 16 libraries by default, named 0-15

Select the specific library

select index
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Clear the current library

flushdb
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Clear all libraries

flushall
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String Common commands

Setting a single value

set key value
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Get a single value

get key
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Set multiple values at once

mset k1 v1 k2 v2 k3 v3...
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Take multiple values based on multiple keys

mget k1 k2 k3
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On the 1

incr key
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Since the minus 1

decr key
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Increments the specified number

incrby key number
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Subtracts the specified number

decrby key number
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List Common commands

Add data (left), final effect V3 v2 V1

lpush key v1 v2 v3
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Add data (add on the right), resulting in v1, V2, v3

rpush key v1 v2 v3
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Remove the far left

lpop key
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Remove the far right

rpop key
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Query all data in the collection

lrange key 0 -1
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Queries the specified index range data, including header and tail

lrange key startIndex endIndex
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Queries the specified value against the index

lindex key index
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Delete count values from the specified collection

  • Count >0: deletes from the left
  • Count =0: deletes all values in the specified collection
  • Count <0: delete starts on the right
lrem key count value
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Set Common commands

Add data, note: The added data is unordered

sadd key v1 v2 v3
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Query all data

smembers key
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Deletes the specified value. You can delete multiple values

srem key v1 v2 ...
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Common hash commands

Setting a single value

hset key field value
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Get a single value

hget key field
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Set multiple values at once

hmset key field1 value1 field2 value2...
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Take multiple values at once

hmget key field1 field2...
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Get all keys

hkeys  key
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Get all values

hvals key
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Get all keys and values

hgetall key
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Sorted set Common command

Sorted set: Sorted and not repeatable

  • Each element is associated with a score of type double, which is how Redis sorts collections
  • The members of an ordered set are unique, but the score can be repeated.

Add data

zadd key score1 value1 score2 value2
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Gets the number of ordered collection members

zcard key2
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Computes the number of members in an ordered set with a specified interval fraction, including heads and tails

zcount key minScore MaxScore
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Returns an ordered collection of members within a specified interval, including head and tail, by indexing the interval

zrange key startIndex endIndex 
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