Added instructions to import a database in MySQL from a file.

Practical/README.md

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+# How to import database in MySQL
+
+This is a guide for importing a database in MySQL using the terminal.
+
+---
+
+## Prerequisites
+- Have MySQL installed on your machine
+
+---
+
+## Guide
+
+1. Download the database file from this repository. These database files have `.sql` extension and can be found in the Assignment folders within the [Practical folder](https://git.kska.io/DatabaseManagementSystems/src/branch/main/Practical/).
+
+2. After downloading the file, locate it in the `Files` app. The downloaded file will mostly likely be preset in the _Downloads_ folder.
+
+3. Right click in a empty space in the `Files` app window, and click on `Open in Terminal` (or something along those lines).
+
+4. Now, start `mysql`
+```shell
+sudo mysql -u root -p
+```
+
+5. Create an empty database & exit:
+```sql
+CREATE DATABASE database_name;
+exit
+```
+
+> `database_name` is the name of your database in which all the tables, data, etc. will be imported.
+
+6. Lastly, import the database from `database.sql` file:
+```shell
+sudo mysql -u root -p database_name < database.sql
+```
+
+---
+
+## Example
+
+Let's consider I want to import the database for Assignment-A2. The database file is present in [Practical/Assignment-A2](https://git.kska.io/DatabaseManagementSystems/src/branch/main/Practical/Assignment-A2) folder.
+
+1. First download the [Database_A2.sql](https://git.kska.io/DatabaseManagementSystems/src/branch/main/Practical/Assignment-A2/Database_A2.sql) file.
+
+2. Locate the file in `Files` app, mostly likely present in the _Downloads_ folder.
+
+3. Right click in an empty space in the **Files** app window and click **Open in Terminal**.
+
+4. Start mysql: `sudo mysql -u root -p`
+
+5. Create an empty database: `CREATE DATABASE Database_A2`
+
+6. Exit from mysql: `exit`
+
+7. Lastly, import the file: `sudo mysql -u root -p Database_A2 < Database_A2.sql`
+
+8. That's it! Your database has been imported in MySQL.
+
+---