>Note
>
>This task will consist of 2 parts.

## Setting up the connection:

Your task is to **create the necessary database in MySQL** using regular SQL queries. I will provide you with the codes for the table that we will **use and develop** in this course; you just need to insert these codes into your table. 

Then, you need to **connect your database to the project**. I've left a template for you in `hibernate.cfg.xml`; you just need to insert the **link to your database** (I recommend using the name `testDatabase`, as this database will be used to **test your solution**. When we have a finished project, we will create a new database).

You also need to fill in the `username` in MySQL (most likely, it will be `root`) as well as your `password`.

*Don't worry, I won't see your password :).*



Here are the **commands to create the database and two necessary tables in it**. 

Use this exact database for this task.

>Note
>
>We will continue to use this database further, so please do not delete it after completing the task.

Creating the database and using it:



```sql
CREATE DATABASE testDatabase;
  
USE testDatabase;
```

```sql
CREATE TABLE employees (
    id INT PRIMARY KEY NOT NULL AUTO_INCREMENT,
    name VARCHAR(50),
    position VARCHAR(50),
    salary DECIMAL(10, 2),
    hire_date DATE
);
```

```sql
CREATE TABLE departments (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(50) NOT NULL,
    location VARCHAR(100)
);
```

## Creating the entity class:

Next, you need to go to the `Department` class and **make this class an entity class**. Use all the necessary **annotations** learned in previous chapters. You can also use the **Project Lombok** library, or you can manually write getters, setters, and constructors. The choice is yours.

After you complete the task, **run the integration tests I've written**, and they will verify the correctness of your task.

<link
        rel="stylesheet"
        href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.62.3/codemirror.min.css"
/>
<link
        rel="stylesheet"
        href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.62.3/theme/dracula.min.css"
/>


<link
        rel="stylesheet"
        href="https://codefinity-content-media-v2.s3.eu-west-1.amazonaws.com/courses/c1087363-9025-4c37-8d5e-983a32a007e9/buttons-section/hint-solution-with-copyable-%26%3Dhighlighted-code.css"
/>

<div class="button-container">
    <button
            class="button"
            onclick="toggleBlock6('hint-block6', 'solution-block6')"
    >
        Hint
    </button>
    <button
            class="button"
            onclick="toggleBlock6('solution-block6', 'hint-block6')"
    >
        Solution
    </button>
</div>


<div id="hint-block6" class="block hint-styling-block">
    <ol>
        <li>1. Use annotations: <code>@Entity</code>, <code>@Table(name = "departments")</code>, <code>@Id</code>, <code>@GeneratedValue(strategy = GenerationType.IDENTITY)</code>, and <code>@Column</code>.</li>
        <li>2. If you encounter any issues with connecting to the database, double-check the database name, username, password, and make sure that these tables exist in the database.</li>
    </ol>
</div>

<div id="solution-block6" class="block solution-styling-block">
    
    <textarea id="code-6" class="language-java">
package codefinity.model;

import jakarta.persistence.*;
import lombok.Data;
import lombok.NoArgsConstructor;

@NoArgsConstructor
@Entity
@Table(name = "departments")
public @Data class Department {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;

    @Column(name = "name")
    private String name;

    @Column(name = "location")
    private String location;
}</textarea>

    <button class="copy-button" onclick="handleClick6('code-6')">
        <svg
                width="20"
                height="20"
                x="0"
                y="0"
                viewBox="0 0 32 32"
                style="enable-background: new 0 0 512 512"
                xml:space="preserve"
                class=""
        >
      <g>
        <path
                d="m26.121 6.707-3.828-3.828A2.98 2.98 0 0 0 20.172 2H12a3.003 3.003 0 0 0-3 3v1H8a3.003 3.003 0 0 0-3 3v18a3.003 3.003 0 0 0 3 3h12a3.003 3.003 0 0 0 3-3v-1h1a3.003 3.003 0 0 0 3-3V8.829a2.982 2.982 0 0 0-.879-2.122ZM22 5.414 23.586 7H22ZM20 28H8a1.001 1.001 0 0 1-1-1V9a1.001 1.001 0 0 1 1-1h8v3a2.002 2.002 0 0 0 2 2h3v14a1 1 0 0 1-1 1ZM18 9.414 19.586 11H18ZM24 24h-1V12.829a2.982 2.982 0 0 0-.879-2.122l-3.828-3.828A2.98 2.98 0 0 0 16.171 6H11V5a1.001 1.001 0 0 1 1-1h8v3a2.002 2.002 0 0 0 2 2h3v14a1 1 0 0 1-1 1Zm-6-8h-8a1 1 0 0 1 0-2h8a1 1 0 0 1 0 2Zm0 4h-8a1 1 0 0 1 0-2h8a1 1 0 0 1 0 2Zm0 4h-8a1 1 0 0 1 0-2h8a1 1 0 0 1 0 2Z"
                fill="#a6b8e6"
                opacity="1"
                data-original="#000000"
                class=""
        ></path>
      </g>
    </svg>
    </button>
</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.62.3/codemirror.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.62.3/mode/clike/clike.min.js"></script>


<script src="https://cdn.jsdelivr.net/npm/notiflix@2.7.0/dist/notiflix-aio-2.7.0.min.js"></script>

<script>
    function onPageLoad6() {
        var editor = CodeMirror.fromTextArea(document.getElementById("code-6"), {
            lineNumbers: true,
            mode: "text/x-java",
            theme: "dracula",
        });

        // ----------> HIGHLIGHT <----------
        editor.markText(
            { line: 0, ch: 0 },
            { line: 0, ch: 0 },
            { className: "specific" }
        );

        editor.markText(
            { line: 0, ch: 0 },
            { line: 0, ch: 0 },
            { className: "specific" }
        );

        editor.markText(
            { line: 0, ch: 0 },
            { line: 0, ch: 0 },
            { className: "specific" }
        );

        editor.markText(
            { line: 0, ch: 0 },
            { line: 0, ch: 0 },
            { className: "specific" }
        );

        editor.markText(
            { line: 0, ch: 0 },
            { line: 0, ch: 0 },
            { className: "specific" }
        );

        // Initially hide both the hint and solution blocks
        hideBlock6("hint-block6");
        hideBlock6("solution-block6");
    }

    // Copy Button handler
    const handleClick6 = (codeBlock) => {
        const textarea = document.getElementById(codeBlock);
        const copiedText = textarea.value;

        navigator.clipboard.writeText(copiedText);

        Notiflix.Notify.Success("Copied to clipboard!", {
            timeout: 2000,
            width: "260px",
            position: "center-top",
            textColor: "#ff5549",
        });
    };

    // Function to toggle the visibility of a block
    const toggleBlock6 = (blockId) => {
        const block = document.getElementById(blockId);

        if (block.style.display === "none" || block.style.display === "") {
            hideBlock6("hint-block6");
            hideBlock6("solution-block6");
            showBlock6(blockId);
        } else {
            hideBlock6(blockId);
        }
    };

    // Function to show a block
    const showBlock6 = (blockId) => {
        const block = document.getElementById(blockId);
        block.style.display = "block";
    };

    // Function to hide a block
    const hideBlock6 = (blockId) => {
        const block = document.getElementById(blockId);
        block.style.display = "none";
    };

    const imgElement6 = document.createElement("img");
    imgElement6.src = "nonexistent-image";
    imgElement6.style.display = "none";
    imgElement6.onerror = onPageLoad6;

    document.body.appendChild(imgElement6);
</script>

Every backend developer must be proficient in working with various databases. Connecting a database to the code and performing data operations directly from Java code to execute SQL queries and various data operations directly from the code. JDBC and Hibernate help developers with this. It's time to learn how to connect a database to your IDE, use tables from this database, and manipulate data!

Why do we need a database? How does the interaction between a database and code work? What tools are used for different types of databases? You will learn all about this in this section!

This section will tell you how to set up and use Hibernate. You will learn how this framework works, what ORM is, and how to work with databases efficiently. You will also learn to write basic operations with a connected database, demonstrating your skills in practice!

In this section, we will complete work on the project's foundation for employee management in the company. We will add the remaining operations and one more entity.

Java Data Manipulation with Hibernate

Challenge: Entity Creation

Setting up the connection:

Creating the entity class: