Зміст курсу

Introduction to .NET with C#

1. Introduction

What is the .NET Platform exactly?Creating a Console Application Taking input from the User Task - Building a Simple Calculator Dealing with Exceptions caused by User Input Task - Improving the Calculator Reading Files Writing Files Task - File Based Calculator

2. Asynchronous Programming and Introduction to Web Services

What is Asynchronous Programming?Implementing an Asynchronous Method Task - Asynchronously Reading Files Introduction to APIs Making a GET Request Task - Using an API Handling Exceptions caused by HTTP Request Task - Exception Handling for API Response

3. Introduction to Databases with .NET

What is a Database?Structure of a Relational Database Setting Up A MySQL Server Connecting to the MySQL Server Task - Writing Connection Strings Executing Commands Task - Executing MySQL Commands MySqlCommand Methods Task - Connecting to a MySQL Database and Executing Commands

4. CRUD Operations with MySQL

Introduction to CRUD Operations Installing & Using MySQL Workbench CREATE - Part I Task - Using CREATE CREATE - Part II Task - Using INSERT Read Task - Using SELECT Update Task - Using UPDATE Delete - Part I Delete - Part II Task - Using DELETE

5. Optimizing Database Operations

Stored Procedures Task - Executing Stored Procedures DataReader vs DataSet DataAdapter & DataSet Task - Reading Tables using MySqlDataAdapter What's Next?

Introduction to .NET with C#

Task - Using DELETE

The shop owner decided to stop selling vegetables, and they need your help removing all the vegetables from the database.

Your task is to delete all the rows from the store table where the category is Vegetables.

Link to the Task: GitHub

The syntax for the delete statement is DELETE FROM table_name WHERE condition.


using MySql.Data.MySqlClient;

public class CRUD_Task_5
{
    // Write the connection string here
    public static string connectionString = "host=___;port=___;user=___;password=___;database=___";

    public static void Main(string[] args)
    {
        // Write code below this line
        using (MySqlConnection connection = new MySqlConnection(connectionString))
        {
            connection.Open();

            string cmdText = "DELETE FROM store where category = 'Vegetables';";
            MySqlCommand cmd = new MySqlCommand(cmdText, connection);
            cmd.ExecuteNonQuery();
        }
        // Write code above this line
    }
}

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Секція 4. Розділ 13

Зміст курсу

Introduction to .NET with C#

1. Introduction

2. Asynchronous Programming and Introduction to Web Services

3. Introduction to Databases with .NET

4. CRUD Operations with MySQL

5. Optimizing Database Operations

Stored Procedures Task - Executing Stored Procedures DataReader vs DataSet DataAdapter & DataSet Task - Reading Tables using MySqlDataAdapter What's Next?

Introduction to .NET with C#

Task - Using DELETE

The shop owner decided to stop selling vegetables, and they need your help removing all the vegetables from the database.

Your task is to delete all the rows from the store table where the category is Vegetables.

Link to the Task: GitHub

The syntax for the delete statement is DELETE FROM table_name WHERE condition.


using MySql.Data.MySqlClient;

public class CRUD_Task_5
{
    // Write the connection string here
    public static string connectionString = "host=___;port=___;user=___;password=___;database=___";

    public static void Main(string[] args)
    {
        // Write code below this line
        using (MySqlConnection connection = new MySqlConnection(connectionString))
        {
            connection.Open();

            string cmdText = "DELETE FROM store where category = 'Vegetables';";
            MySqlCommand cmd = new MySqlCommand(cmdText, connection);
            cmd.ExecuteNonQuery();
        }
        // Write code above this line
    }
}

Все було зрозуміло?

Секція 4. Розділ 13