Redis common commands

Other operating

• select 0 Select the first 0 A database
• randamkey Get random key, For example, three key：key1,key2,key3, Will return these three randomly key One of them
• move myString 1 Put the current database key Move to a database , The target library has , You can't move
• type key Returns the current key Of value type , May be string,list etc.
• keys * Returns all current key
• del key1 Delete key1
• exists key Judge whether it exists key 0 Why not 1 be for the purpose of
• expire key1 10 Set up key1 Expires in ten seconds
• pexpire key1 5000 Set up key1 Expire in five seconds
• persist key1 Delete expiration time

string

• set key1 value1 ex 10 Set up key1 And the value ,10 It will expire in seconds
• set key value Set up key and value
• get key obtain key Of value
• getrange key1 0 -1 Intercepting string , Including head and tail , from 0 Start
• getset key1 newvalue Set and return the old value
• mset key1 value1 key2 value2 key3 value3 Batch settings key and value Value
• mget key1 key2 key3 Batch acquisition key1 key2 key3 Value
• setnx key value Insert if it doesn't exist （not exists） return 0 or 1, Represents the success or failure of the operation
• set key value nx Insert if it doesn't exist return value
• set key value xx Must exist before inserting , Returns the inserted value
• setrange key index value from index Start replacing value , Return string length
• incr key Increasing key
• incrby key2 10 to key2 Increasing 10
• decr key2 key2 Decline 1
• decrby key2 5 key2 Decline 5
• incrbyfloat key3 0.5/-0.5 Floating point number increase or decrease
• append key tail Additional
• strlen key return key The length of

hash

• hset hashname key1 value Go to hashname Of hash To add a key-value pair
• hget hashname key1 obtain hashname in key Of value
• hmset hashname key1 value1 key2 value2 Set key value pairs in batch
• hmget hashname key1 key2 Batch fetch value
• hgetall hashname Get all key value
• hexists hashname key1 Judge key Whether there is return 0,1
• hsetnx hashname keynx value Set nonexistent key
• hincrby hashname key1 10/-2 Set up key1 Increasing 10
• hdel hashname key Delete key
• hkeys hashname Get all key
• hvals hashname Get all value
• hlen hashname To obtain the length of the （ Namely map The number of key value pairs inside ）

list

• lpush listname value1 value2 value3 Insert left
• rpush listname value1 value2 value3 Right insert
• lrange listname start end From 0 Everything from the first to the last （ Including head and tail ）
• lpop listname Pop up an element on the left
• rpop listname Pop up an element on the right
• llen listname Get the length of the list （ Element number ）
• lrem listname conunt value Remove elements for example ：lrem list1 2 ccc ： Delete list1 The two values from the left are ccc The elements of , The returned value is the number of deleted
• lindex listname index（0,1 etc. ） Take out No n It's worth , Index starts from zero
• lset list index value Set the value of the index
• ltrim list startindex endindex Intercept list Some of the elements of , Delete other elements
• linsert list before value towards list Medium value Insert... Before element
• linsert list after value towards list Medium value Insert after element
• rpoplpush sourcelist destinationlist take sourcelist Pop up an element on the right , Insert left destinationlist, Return that element
• sort listname alpha Alphabetical order

set

• sadd set value1 value2 value3 towards set Add elements to it , Returns the number of elements successfully added
• smembers set set All elements in
• srem set value1 value2 Delete elements from the collection , Returns the number of successfully deleted
• sismember set value Judge value Whether there is set in , return 0 perhaps 1
• scard set obtain set Number of members of the set
• sdiff set1 set2 seek set1 and set2 And return
• sinter set1 set2 seek set1 and set2 Intersection of and return to
• sunion set1 set2 seek set1 and set2 Union
• srandom set from set Take random elements
• spop set Pop up the first element from the collection , Return the pop-up element

zset Ordered set （ Ranking List ）

• zadd zset score value … towards zset Add elements to it , Can be added more than once , Returns the number of added elements , for example zadd zset 1 jack 2 mike 3 lily If there is only one element , Just return the score of this element
• zincrby zset score value to value Elements increase scores , for example ：zincrby zset 2 lily to lily Element increases by two points
• zcard zset obtain set Number of members of the set
• zscore zset value Get the score of this element
• zrange zset beginindex endindex withscores Get all the elements of the set through fractional sorting , And show the score , With head and tail
• zcount zset minscore maxscore Get the number of members in the specified score interval
• zrangebyscore zset min max withscores Gets the element of the specified range （ With head and tail ）
• zrangebyscore zset min max withscores limit 0,10 Pagination （ skip 0 strip , take 10 Data , If you inquire about page 5 , Namely 40,10）
• zrem zset value1 value2 Remove elements from collection , The return value is the number of elements removed
• zremrangebyrank minrank maxrank Remove the elements of the specified ranking interval
• zremrangebyscore minscore maxscore Remove the element of the specified score interval
• zrank zset element Returns the index of the specified element , from 0 Start
• zrevrank zset element Returns the index of the specified element , In reverse order of fractions