Introduction to Redis Get Key
Redis manages all types and associations of data structure in an organized way. It is efficient compared to another standard database with confined tables, where rows and columns are housed data. Though Redis is non-relation all action tabs are system configured with standard key-value pairs. During development, it is easy to track the files in the database.
Key Takeaways
- In Redis, the key should be defined with the SET command.
- The key that is present, can be verified with exist command.
- Redis supports different types of data like hashes, sets, list.
- Data can be retrieved using the key based on the data type. It can be checked using the Type command.
- The retrieval of key-value is made using the GET command and returns the key in string type.
What is Redis Get Key?
Redis Get key command is used in the key store which is followed by a specific pattern to search and retrieve the key that is matched to the given pattern. It is implied with the * operator to save the data in all formats and suitable values are returned. Redis is a well-organized key-value database where all the key-value pair is saved. Redis works with a simple command to execute basic operations.
How to Use Redis Get Key?
So before using the get command to retrieve the key, we can define the data using the set command in the Redis CLI.
Syntax:
SET course “AWS”The “course” acts as a key to the given value in the example.
Here the user created a key called the course and set a related value as AWS. So to store another course value without creating another key is done with the namespace option.
SET course:2 “DevOps”
SET course:3 “Python”
Now to fetch the value saved in a key, the user can simply GET option along with the key name.
GET course“AWS”
The command allows the Redis to fetch the value saved in the particular key.
The user can also work on the GET command along with the unique value.
GET course:3“Python”
To fetch all the keys in the database, the user can use the KEY option followed by a specific pattern to match the given values. The user can surpass the pattern using an asterisk to get all the keys.
Using the below syntax:
KEYS *The keys can be retrieved from the data house but it is not advisable to execute in the production window which is based on the higher dimensional dataset.
Redis Get Key Setting
Assigning a value to a key can be made using the GET command. If the key is not present, then the output will be executed as nil.
GET ecosystem(nil)
SET coursekey "AWS"“OK”
GET coursekey“AWS”
Redis String Get Key
The Redis string can be assigned keys to follow the specific operation.
- SET Key value is used to fix the value to the given key.
- GET Key is used to fetch the value of the given key.
- The GETRANGE key is used to fetch the substring values and execute its old data.
- GETSET key value is used to set the string to a key and execute its old data.
- GETBIT key offset is used to return the value at offset as a string and can be saved to a key.
- MGET key1 [key2..] is used to fetch all the values of a given key.
- SETBIT key offset is used to clear or set the offset in the string that is saved in the key.
- SETEX key is used to allow the value with expiry details to a key.
- SETNX key value is used to allow the key value, if there is no value in the key or if the key is not present.
- SETRANGE key offset overwrites the string part in the key mentioned in the particular offset.
- MSET key value used to allocate n number of keys to multiple valuesSets multiple keys to multiple values.
- MSETNX key is used to allocate multiple keys and values if no other keys are present.
- PSETEX key milliseconds are used to fix expire and live values in milliseconds to the key.
- INCRBY key increment increases the integer value to the given amount in a key.
- DECR key decreases the integer value in a key one by one.
- DECRBY key decrement is used to decrease the integer value to the given amount in a key.
- Decrements the integer value of a key by one.
- APPEND key is used for appending the key value.
Redis Get Multiple Keys
Most of the objects in Redis use multiple get keys.
The example is shown below:
SET course "AWS"OK
SET services "23 services "OK
The course and service are the keys that are set and the original string values are given later so that they can be viewed with the GET command.
GET course“AWS”
GET services“23 services”
Examples of Redis Get Key
The user cannot reuse the similar course and services title hereafter so that it can be overwritten to the present data. The user can imply namespace syntax with a delimiter and can give every course or service name a unique key.
SET course:1 "AWS"OK
SET services:1 "23 services"OK
SET course:2 "DevOps"OK
SET services:2 "8 tools"OK
Now, the given data can be fetched using the GET command.
GET course:1“AWS”
GET course:2“DEVOPS”
FAQ
Given below are the FAQs mentioned:
Q1. How to check the length of the key?
Answer: STRLEN key fetches the length and the value saved in the key.
Q2. How to increase the value one by one in a key?
Answer: INCR key is used to increase the integer value in the key one by one.
Q3. What if the value in a key is not a string?
Answer: The error message is executed if the value saved at the key is not a proper string, because GET fetches only string values
Conclusion
Hence these are important functions of the GET key in Redis and can be used in data retrieval of key-value pairs. The SET and GET commands are used to search and fetch the data in Redis.
Recommended Articles
This is a guide to Redis Get Key. Here we discuss the introduction, how to use redis get keys, settings, and examples. You may also have a look at the following articles to learn more –
