translated subtopic about Redis

README_ENG.md

@@ -1515,10 +1515,40 @@ Look for a special [awesome repository](https://github.com/sindresorhus/awesome#
 
 -   ### Redis
 
+    [Redis](https://redis.io/) is a fast data storage working with _key-value_ structures. It can be used as a database, cache, message broker or queue.
+
+    -   Data types
+        > String / Bitmap / Bitfield / List / Set / Hash / Sorted sets / Geospatial / Hyperlog / Stream
+    -   Basic operations
+        ```bash
+        SET key "value" # setting the key with the value "value"
+        GET key # retrieve a value from the specified key
+        SETNX key "data" # setting the value / creation of a key
+        MSET key1 "1" key2 "2" key3 "3" # setting multiple keys
+        MGET key1 key2 key3 # getting values for several keys at once
+        DEL key # remove the key-value pair
+        INCR someNumber # increase the numeric value by 1
+        DECR someNumber # decrease the numeric value by 1
+        EXPIRE key 1000 # set a key life timer of 1000 seconds
+        TTL key # get information about the lifetime of the key-value pair
+            # -1 the key exists, but has no expiration date
+            # -2 the key does not exist
+            # <another number> key lifetime in seconds
+        SETEX key 1000 "value" # consolidation of commands SET and EXPIRE
+        ```
+    -   Transactions
+        > `MULTI` — start recording commands for the transaction. <br> > `EXEC` — execute the recorded commands. <br> > `DISCARD` — delete all recorded commands. <br> > `WATCH` — command that provides execution only if other clients have not changed the value of the variable. Otherwise EXEC will not execute the written commands.
+
 <details>
     <summary>🔗 <b>References</b></summary>
 
-</details>
+1. 📺 [**Redis in 100 Seconds** – YouTube](https://youtu.be/G1rOthIU-uo)
+1. 📺 [**Redis In-Memory Database Crash Course** – YouTube](https://youtu.be/V7FPk4J10KI)
+1. 📺 [**Redis Course - In-Memory Database Tutorial** – YouTube](https://youtu.be/XCsS_NVAa1g)
+1. 📺 [**Redis Crash Course - Transactions** – YouTube](https://youtu.be/5seIrOGYHPo)
+1. 📄 [**How To Run Transactions in Redis** – Digital Ocean](https://www.digitalocean.com/community/cheatsheets/how-to-run-transactions-in-redis)
+1. 📄 [**Redis cheatsheet** – QuickRef](https://quickref.me/redis)
+ </details>
 
 <div align="right"><a href="#top">Contents ⬆️</a></div>