Python SQLite connection.close() Function

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The python connection.close() function is used to close the database connection in python and java programming languages. This function is useful for resource management and also to handle files and memory for the connection database.

In SQLite, a connection refers to an active link between the application and database. This connection allows us to execute SQL commands and queries in the database.

Syntax

Following is the syntax for the connection.close() function.

conn.close()

Parameters

This function doesn't take any parameters.

Return Value

This connection.rollback() function has no return value.

Example 1

The connection.close() function doesn't produce output directly, then this function specifies that the connection to the database is closed.

Here, is a basic example using the connection.close() function.

import sqlite3
connection = sqlite3.connect('res.db')
connection.close()

Output

By running the above code, this program simply creates and closes the database without any output.

Example

Consider the following EMPLOYEES table which stores employees ID, Name, Age, Salary, City and Country −

ID	Name	Age	Salary	City	Country
1	Ramesh	32	2000.00	Maryland	USA
2	Mukesh	40	5000.00	New York	USA
3	Sumit	45	4500.00	Muscat	Oman
4	Kaushik	25	2500.00	Kolkata	India
5	Hardik	29	3500.00	Bhopal	India
6	Komal	38	3500.00	Saharanpur	India
7	Ayush	25	3500.00	Delhi	India

Example 2

In the below example, we are deleting the rows from the given employees table using connection.close() function.

import sqlite3
connection = sqlite3.connect('res.db')
cursor = connection.cursor()
cursor.execute("DELETE FROM employees WHERE ID IN (2, 3, 4, 5, 7)")
connection.commit()
connection.close()

Output

We will get the output as follows −

ID	Name	Age	Salary	City	Country
1	Ramesh	32	2000.00	Maryland	USA
6	Komal	38	3500.00	Saharanpur	India

Example 3

In the below example we are updating the salaries of all employees to 3000 using connection.close() function.

import sqlite3
connection = sqlite3.connect('res.db')
cursor = connection.cursor()
cursor.execute("UPDATE Employees SET Salary = 3000.00 WHERE ID IN (1, 2, 3, 4, 5, 6, 7)")
connection.commit()
connection.close()

Output

The result is obtained as follows −

ID	Name	Age	Salary	City	Country
1	Ramesh	32	3000.00	Maryland	USA
2	Mukesh	40	3000.00	New York	USA
3	Sumit	45	3000.00	Muscat	Oman
4	Kaushik	25	3000.00	Kolkata	India
5	Hardik	29	3000.00	Bhopal	India
6	Komal	38	3000.00	Saharanpur	India
7	Ayush	25	3000.00	Delhi	India