Python SQLite cursor.fetchone() Function

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The Python cursor.fetchone() function retrieves data from the next query, this function returns a single sequence or None when there is no data is available.

This function can be used as an iterator, and this fetechone() can also be called fetchall() and fetchmany(). It is particularly useful when we expect a query to return a single row or when we want to process rows one at a time.

Syntax

Following is the syntax for the cursor.fetchone() function.

row = cursor.fetchone()

Parameters

This function doesn't take any parameters.

Return Value

If a single row is available, then this function returns the next row as a tuple.

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 1

Here's an example using the cursor.fetchone() function to retrieve the first row from the table.

import sqlite3
conn = sqlite3.connect('res.db')
cursor = conn.cursor()
cursor.execute("SELECT * FROM employees")
row = cursor.fetchone()
print(row)

Output

We will get the result as follows −

ID	Name	Age	Salary	City	Country
1	Ramesh	32	2000.00	Maryland	USA

Example 2

In the example below, we are going to delete the first row from the table using the cursor.fetchone(), then this function will return the second row from the database.

import sqlite3
conn = sqlite3.connect('res.db')
cursor = conn.cursor()
cursor.execute("DELETE FROM employees WHERE ID = 1")
conn.commit()
cursor.execute("SELECT  * FROM employees")
print(cursor.fetchone())
conn.close()

Output

The result is obtained as follows −

ID	Name	Age	Salary	City	Country
2	Mukesh	40	5000.00	New York	USA

Example 3

Now, we are updating the first row in the database. Using the cursor.fetchone() function, it will then return the updated first row from the database.

import sqlite3
conn = sqlite3.connect('res.db')
cursor = conn.cursor()
cursor.execute("UPDATE employees SET Salary = 5500.00 WHERE ID = 1")
cursor.commit()
cursor.execute("SELECT * FROM employees WHERE ID = 1")
print(cursor.fetechone())
conn.close()

Output

The output is obtained as follows −

ID	Name	Age	Salary	City	Country
1	Ramesh	32	5500.00	Maryland	USA