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Databases in Python
course content

Kursinnehåll

Databases in Python

Databases in Python

1. Introduction to SQLite
SQLiteWhat is SQLite3 Library?Connecting to DatabaseCreating a Simple TableChallenge: First Table
2. CRUD
What is CRUD?Creation OperationsRead OperationsUpdate OperationsDelete Operations
3. More About SQLite
PRIMARY KEYData TypesChallenge: Table Design
4. SQLAlchemy
Object–Relational MappingGetting Started with SQLAlchemyData TypesCreating Your First ModelBuilding SQLAlchemy ObjectsReading from DBUpdating to DBDeleting from DB

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PRIMARY KEY

A PRIMARY KEY is a constraint applied to one or more columns within a table to ensure that each record in the table is uniquely identifiable. It serves as a unique identifier for each row, making it easy to reference and manipulate specific records.

Here's how to define a PRIMARY KEY in the structure of a table:

python

The "id" column is defined as the PRIMARY KEY. This means that each record in the "users" table will have a unique "id" value, which can be used to identify and access specific records. A PRIMARY KEY is crucial for ensuring data integrity and enabling efficient data retrieval.

question mark

Which of the following statements best describes a PRIMARY KEY in a database?

Select the correct answer

Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 1

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course content

Kursinnehåll

Databases in Python

Databases in Python

1. Introduction to SQLite
SQLiteWhat is SQLite3 Library?Connecting to DatabaseCreating a Simple TableChallenge: First Table
2. CRUD
What is CRUD?Creation OperationsRead OperationsUpdate OperationsDelete Operations
3. More About SQLite
PRIMARY KEYData TypesChallenge: Table Design
4. SQLAlchemy
Object–Relational MappingGetting Started with SQLAlchemyData TypesCreating Your First ModelBuilding SQLAlchemy ObjectsReading from DBUpdating to DBDeleting from DB

book
PRIMARY KEY

A PRIMARY KEY is a constraint applied to one or more columns within a table to ensure that each record in the table is uniquely identifiable. It serves as a unique identifier for each row, making it easy to reference and manipulate specific records.

Here's how to define a PRIMARY KEY in the structure of a table:

python

The "id" column is defined as the PRIMARY KEY. This means that each record in the "users" table will have a unique "id" value, which can be used to identify and access specific records. A PRIMARY KEY is crucial for ensuring data integrity and enabling efficient data retrieval.

question mark

Which of the following statements best describes a PRIMARY KEY in a database?

Select the correct answer

Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 1
Vi beklagar att något gick fel. Vad hände?
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