Redis(2)-Redis Common Command Quick Reference Manual

Redis common commands quick check

Redis mainly has 5 data types, including String, List, Set, Zset, Hash, which can meet most of the usage requirements

type of data	Storeable Value	operating	Application scenario
String	String, integer, floating point	Operate the entire string or part of it; increase and decrease the logarithm	Cache current limit counter Distributed lock Distributed Sesssion
Hash	Unordered hash table containing key-value pairs	Add, get, and remove a single key-value pair; get all key-value pairs; check whether a key exists	User information page visits
List	List	Push and pop elements in the first place; operate on some elements	queue
Set	Unordered collection	Add, get, and remove a single element; check if the element exists; calculate intersection, union, and difference set; get elements randomly from the set	Like, dislike, tag intersection, union, difference operation
ZSet	Ordered set	Add, get, and remove a single element; get the element according to the score range or member to calculate the ranking of a key	To re- ordering (ranking)

1. String type commonly used commands

The subscripts in all commands of String are calculated from 0

set key value                   给key设置值value
get key                         获取key
getrange key start end          字符串分段(下标从0开始，双闭包，end为-1表示取start到所有)
getset key new_value            覆盖值，返回旧值
mset k1 v1 [k2 v2…]             批量设置key value
mget k1 [k2…]                   批量获取
msetnx k1 v1 [k2 v2 …]          为多个键分别设置它们的值，仅当键不存在时 
setnx key value                 设置键的值，仅当键不存在时设置
setex key seconds value         设置键值并设置过期时间秒（expire）
setrange key index value        从index开始替换为value(value有几位替换几位，返回为替换后的key长度)
incr age                        递增
incrby age 10 			        递增，指定步幅10
decr age       		        	递减
decrby age 10   		        递减，指定步幅10
incrbyfloat key float  	        增减浮点数(返回计算后的值)
append key value2               追加
strlen key             		    获取长度
pesetex key milliseconds value  设置键的值和到期时间(以毫秒为单位)
getbit/setbit/bitcount/bitop    位操作

2. Hash type commonly used commands

hset key field value            设置散列字段的字符串值
hget key field			        获取存储在指定键的哈希字段的值
hdel key field2 [field2]        删除一个或多个哈希字段
hexists key field               判断是否存在散列字段(1存在，0不存在)
hgetall key                     获取该hash中所有的属性
hmset key f1 v1 [f2 v2…]        为多个哈希字段分别设置它们的值
hmget key f1 [f2…]              获取多个给定哈希字段的值   
hsetnx key f v                  仅当字段不存在时，才设置散列字段的值
hincrby key field num           按num大小递增
hdel myhash name                删除
hkeys key                       获取哈希中的所有字段
hvals key                       获取哈希中的所有值
hlen key                        获取哈希中长度

3. List type commonly used commands

lpush mylist a b c             将一个或多个值添加到列表,左(头)插入
rpush mylist x y z             将一个或多个值添加到列表,右(尾)插入
lrange mylist s1 e1            获取数据集合(闭包[s1,e1]，e1=-1表示表示取start到所有)
lpop mylist                    弹出元素，左(头)开始第一个
rpop mylist                    弹出元素，右(尾)开始第一个
llen mylist                    获取长度
lrem mylist count value        从列表中删除元素，详见注解1
lindex mylist index            通过其索引从列表获取元素
lset mylist index valuse       通过索引设值
ltrim mylist s1 e1             列表只保留[s1,e1]之间的元素
linsert mylist before|after v1 v2  插入,注解2
rpoplpush list list2           转移列表的数据
lpushx list value              仅当列表存在时才左插入 
rpushx list value             仅当列表存在时才右插入

annotation:

1.lrem mylist count value ：

The parameter countvalues, the parameter list to remove valueelements equal.

count The value of can be the following:

• count > 0: Starting from the end of the header to the table search, removal and valueequal elements, in an amount of count.
• count < 0: Start the search from the head end of the table to the table, to remove with valueequal elements, as the number countof absolute values.
• count = 0: Remove all table valuevalues equal.

2.linsert mylist before|after v1 v2

V2 inserted into the list a value keywhich is located before or after the value v1. When the index is not present in the list key, the no action.

4. Common Commands of Set Type

sadd key v1[v2…]           将一个或多个成员添加到集合
smembers key               获取数据集合全部元素
srem key v1[v2…]           从集合中删除一个或多个成员
spop                       从集合中删除并返回随机一个成员
sismember key v            判断确定给定值是否是集合的成员
scard key                  获取集合中的成员数
sdiff | sinter | sunion key1 [key2]      集合间运算：差集 | 交集 | 并集
sdiffstore|sinterstore|sunionstore  newkey key1 [key2]    差集 | 交集 | 并集 并将结果集存储在newkey键中
srandmember key [count]    从集合中获取一个或多个随机成员
smove oldkey newkey v      将成员从一个集合移动到另一个集合

5. Common commands of ZSet type

zadd key 1 v1          
zadd key 2 v2
zadd key 3 v3            为有序集合key赋值与值权重
zincrby key score v      为某值增长分数score
zscore key v             获取某值分数
zrem key v1 [v2…]        删除一个或多个元素
zcard key                元素数量
zrange key  s e [withscores] 返回有序集 key 中，指定区间内的成员递增(加withscores为同时返回值的scores)
zrangebyscorekey min max [withscores] [LIMIT offset count] 返回指定范围的值，顺序小到大(注解1)
zrevrangebyscore key max min [WITHSCORES] [LIMIT offset count]  指定范围的值，逆序
zcount min max  获得指定分数范围[minx,max]内的元素个数
zremrangebyrank key start stop  按照排名范围删除元素，注解2
zremrangebyscore key min max  按照分数范围[minx,max]删除元素
zrank key v       返回有序集 key 中成员 v 的排名,其中有序集成员按 score 值递减(从小到大)排序。
zrevrank key v    返回有序集 key 中成员 member 的排名,其中有序集成员按 score 值递减(从大到小)排序。
ZUNIONSTORE destination numkeys key [key …] [WEIGHTS weight [weight …]] [AGGREGATE SUM|MIN|MAX] 求并集，注解3
zinterstore destination numkeys key [key …] [WEIGHTS weight [weight …]] [AGGREGATE SUM|MIN|MAX] 求交集，含义同上

annotation:

1.key min max [WITHSCORES] [LIMIT offset count] ：

Returns the ordered set key, all scorevalues between minand max(including between equal minor max) members. Ordered set by a member of scoreincrement value (small to large) arranged in the order.

The optional LIMITparameters used for paging.

The optional WITHSCORESparameter determines just returned result set is a member of an ordered set, or the ordered set of members and their scorevalue is returned together.

2.zremrangebyrank key start stop :

Remove the ordered set key, all members in the interval specified rank (rank).

The following sections are standard parameters startand stopnoted that contained startand stopincluded.

Subscript parameters startand stopare at 0a bottom, that is to say, to 0an ordered set of the first member to 1an ordered set of the second member, and so on. You can also use a negative index to -1indicate the last member, -2he represents the penultimate members, and so on.

3.ZUNIONSTORE destination numkeys key [key …] [WEIGHTS weight [weight …]] [AGGREGATE SUM|MIN|MAX]

Calculation given one or more ordered sets and sets, wherein a given keynumber must be numkeysspecified parameters, and the union (the result set) to the storage destination.

By default, a member of the result set scorevalues are all members of a given set this scorevalue and .

Use WEIGHTSoption, you can each given ordered set are designated a multiplication factor (multiplication factor), all members of each given an ordered set of scorevalues before being passed on to an aggregate function (aggregation function) must first multiplied The factor of this ordered set.

If no WEIGHTSoption is the default setting for the multiplication factor 1.

Use AGGREGATEaggregation option, you can specify and set the result set.

The default parameters used SUM, all members of the set may be a scorevalue , and as a result set of the member scorevalue; parameter MINmay be a member of all sets the minimum score value as the membership in the result set scorevalue; the parameter MAXis It is a collection of all the members of the maximum score value as a result of the member's focus on scorevalue.

Save to: the return value of destinationthe base of the result set.

For specific usage details and other commonly used commands, please refer to this website: Redis Command Reference