[JAVA-6232]: Introduction to QuestDB (#13542)

* [JAVA-6232]: Introduction to QuestDB

* [FIX] Add questdb version as property

* JAVA-6232: Change parent folder

persistence-modules/questdb/README.md

@@ -0,0 +1,2 @@
+### Relevant Articles:
+- [Introduction to QuestDB](#)

persistence-modules/questdb/pom.xml

@@ -0,0 +1,29 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.baeldung</groupId>
+    <artifactId>questdb</artifactId>
+    <name>questdb</name>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-java</relativePath>
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <questdb.version>7.0.0</questdb.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.questdb</groupId>
+            <artifactId>questdb</artifactId>
+            <version>${questdb.version}</version>
+        </dependency>
+    </dependencies>
+</project>

persistence-modules/questdb/src/main/java/com/baeldung/InsertData.java

@@ -0,0 +1,29 @@
+package com.baeldung;
+
+import io.questdb.client.Sender;
+
+
+public class InsertData {
+    static final String SENSORS_TABLE_NAME = "sensors";
+
+    public static void main(String[] args) {
+        try (Sender sender = Sender.builder().address("localhost:9009").build()) {
+            sender.table(SENSORS_TABLE_NAME)
+                    .stringColumn("id", "KTC")
+                    .stringColumn("name", "Kitchen temperature (Celsius)")
+                    .doubleColumn("currentValue", 20)
+                    .atNow();
+            sender.table(SENSORS_TABLE_NAME)
+                    .stringColumn("id", "SMT")
+                    .stringColumn("name", "Smart Garden temperature (Celsius)")
+                    .doubleColumn("currentValue", 28.5)
+                    .atNow();
+            sender.table(SENSORS_TABLE_NAME)
+                    .stringColumn("id", "RM1")
+                    .stringColumn("name", "Room 1")
+                    .doubleColumn("currentValue", 19.5)
+                    .doubleColumn("idealValue", 18.5)
+                    .atNow();
+        }
+    }
+}

pom.xml

@@ -979,6 +979,7 @@
                 <module>persistence-modules/java-mongodb</module>
                 <module>messaging-modules</module>
                 <module>spring-boot-modules/spring-boot-redis</module>
+                <module>persistence-modules/questdb</module>
             </modules>
 
             <properties>
@@ -1251,6 +1252,7 @@
                 <module>libraries-2</module>
                 <module>messaging-modules</module>
                 <module>spring-boot-modules/spring-boot-redis</module>
+                <module>persistence-modules/questdb</module>
             </modules>
 
             <properties>