SQL is essential for managing and querying databases efficiently. It is widely used due to its standardization, scalability, and ability to ensure data integrity. SQL's integration with other technologies makes it a versatile tool in various applications, supporting real-time data processing and decision-making.

У нашому попередньому запиті ми використовували SELECT, щоб отримати один стовпець континенту з таблиці країни. Важливо зазначити, що ви повинні вказати назву стовпця відразу після ключового слова SELECT, а ключове слово FROM вказує назву таблиці, з якої ми бажаємо отримати дані.

SQL Syntax Explanation

To retrieve data from a database, SQL uses the SELECT statement. Here's the basic syntax:

SELECT: Specifies the columns to retrieve;
FROM: Specifies the table from which to retrieve the data.

For example, to get the continent column from the country table, the syntax is:

This query will return all entries in the continent column from the country table.


              1
            
SELECT continent FROM country;

In our previous query, we utilized the SELECT to retrieve a single continent column from the country table. It's important to note that you must specify the column name immediately after the SELECT keyword, and the FROM keyword specifies the name of the table from which we wish to retrieve data.

Завдання

Swipe to show code editor

Write an SQL query to retrieve a capital column from the country table.

_{Once you've completed this task, click the button below the code to check your solution.}

Перейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів

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Секція 1. Розділ 1

Отримання окремих стовпців

Що таке SQL?

База даних

Database

Why SQL Matters

SQL Syntax Explanation

To retrieve data from a database, SQL uses the SELECT statement. Here's the basic syntax:

SELECT: Specifies the columns to retrieve;
FROM: Specifies the table from which to retrieve the data.

For example, to get the continent column from the country table, the syntax is:

This query will return all entries in the continent column from the country table.


              1
            
SELECT continent FROM country;

Завдання

Swipe to show code editor

Write an SQL query to retrieve a capital column from the country table.

_{Once you've completed this task, click the button below the code to check your solution.}

Все було зрозуміло?

Дякуємо за ваш відгук!

Секція 1. Розділ 1

Отримання окремих стовпців

Що таке SQL?

База даних

Database

Why SQL Matters

SQL Syntax Explanation

To retrieve data from a database, SQL uses the SELECT statement. Here's the basic syntax:

SELECT: Specifies the columns to retrieve;
FROM: Specifies the table from which to retrieve the data.

For example, to get the continent column from the country table, the syntax is:

This query will return all entries in the continent column from the country table.


              1
            
SELECT continent FROM country;

Завдання

Swipe to show code editor

Write an SQL query to retrieve a capital column from the country table.

_{Once you've completed this task, click the button below the code to check your solution.}

Все було зрозуміло?

Дякуємо за ваш відгук!

Що таке SQL?

База даних

Database

Why SQL Matters

SQL Syntax Explanation

To retrieve data from a database, SQL uses the SELECT statement. Here's the basic syntax:

SELECT: Specifies the columns to retrieve;
FROM: Specifies the table from which to retrieve the data.

For example, to get the continent column from the country table, the syntax is:

This query will return all entries in the continent column from the country table.


              1
            
SELECT continent FROM country;

Завдання

Swipe to show code editor

Write an SQL query to retrieve a capital column from the country table.

_{Once you've completed this task, click the button below the code to check your solution.}

Секція 1. Розділ 1