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Delete Operations | CRUD
Databases in Python
course content

Зміст курсу

Databases in Python

Databases in Python

1. Introduction to SQLite
2. CRUD
3. More About SQLite
4. SQLAlchemy

bookDelete Operations

Delete operations in SQLite are used to remove records or data from a database table. These operations allow you to delete specific data that is no longer needed.

The primary SQL statement for deleting data is the DELETE statement.

In this code snippet, the first line defines an SQL query that deletes a specific record from the articles table, targeting the record where id is equal to 1. The second line, cursor.execute(delete_query), sends this query to the database for execution.

Deleting Multiple Records

To delete multiple records that match certain criteria, you can use a WHERE clause in the DELETE query:

This query will delete all records where the author matches "John Doe".

Deleting All Records

You can delete all records from a table by omitting the WHERE clause:

This query will delete all records in the "articles" table.

These are the basic concepts for performing delete operations in SQLite using Python. You can customize your DELETE queries to remove specific data from your database as needed.

Завдання
test

Swipe to show code editor

Delete the record from the users table where the id field equals 1.

Switch to desktopПерейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів
Все було зрозуміло?

Як ми можемо покращити це?

Дякуємо за ваш відгук!

Секція 2. Розділ 5
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bookDelete Operations

Delete operations in SQLite are used to remove records or data from a database table. These operations allow you to delete specific data that is no longer needed.

The primary SQL statement for deleting data is the DELETE statement.

In this code snippet, the first line defines an SQL query that deletes a specific record from the articles table, targeting the record where id is equal to 1. The second line, cursor.execute(delete_query), sends this query to the database for execution.

Deleting Multiple Records

To delete multiple records that match certain criteria, you can use a WHERE clause in the DELETE query:

This query will delete all records where the author matches "John Doe".

Deleting All Records

You can delete all records from a table by omitting the WHERE clause:

This query will delete all records in the "articles" table.

These are the basic concepts for performing delete operations in SQLite using Python. You can customize your DELETE queries to remove specific data from your database as needed.

Завдання
test

Swipe to show code editor

Delete the record from the users table where the id field equals 1.

Switch to desktopПерейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів
Все було зрозуміло?

Як ми можемо покращити це?

Дякуємо за ваш відгук!

Секція 2. Розділ 5
toggle bottom row

bookDelete Operations

Delete operations in SQLite are used to remove records or data from a database table. These operations allow you to delete specific data that is no longer needed.

The primary SQL statement for deleting data is the DELETE statement.

In this code snippet, the first line defines an SQL query that deletes a specific record from the articles table, targeting the record where id is equal to 1. The second line, cursor.execute(delete_query), sends this query to the database for execution.

Deleting Multiple Records

To delete multiple records that match certain criteria, you can use a WHERE clause in the DELETE query:

This query will delete all records where the author matches "John Doe".

Deleting All Records

You can delete all records from a table by omitting the WHERE clause:

This query will delete all records in the "articles" table.

These are the basic concepts for performing delete operations in SQLite using Python. You can customize your DELETE queries to remove specific data from your database as needed.

Завдання
test

Swipe to show code editor

Delete the record from the users table where the id field equals 1.

Switch to desktopПерейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів
Все було зрозуміло?

Як ми можемо покращити це?

Дякуємо за ваш відгук!

Delete operations in SQLite are used to remove records or data from a database table. These operations allow you to delete specific data that is no longer needed.

The primary SQL statement for deleting data is the DELETE statement.

In this code snippet, the first line defines an SQL query that deletes a specific record from the articles table, targeting the record where id is equal to 1. The second line, cursor.execute(delete_query), sends this query to the database for execution.

Deleting Multiple Records

To delete multiple records that match certain criteria, you can use a WHERE clause in the DELETE query:

This query will delete all records where the author matches "John Doe".

Deleting All Records

You can delete all records from a table by omitting the WHERE clause:

This query will delete all records in the "articles" table.

These are the basic concepts for performing delete operations in SQLite using Python. You can customize your DELETE queries to remove specific data from your database as needed.

Завдання
test

Swipe to show code editor

Delete the record from the users table where the id field equals 1.

Switch to desktopПерейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів
Секція 2. Розділ 5
Switch to desktopПерейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів
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