How to Insert NULL Values into a MySQL Database from Python?

Inserting NULL Values into MySQL from Python

When working with MySQL, occasionally you may encounter a situation where you need to insert a blank or empty value into a field. If you attempt to insert an empty string into a MySQL database, you may receive an error. This is because MySQL cannot accept empty strings as a valid value.

To resolve this issue, you can insert NULL into the field instead. NULL represents an absence of data and is recognized by MySQL as a valid value. By inserting NULL, you can indicate that no value is available for a particular field.

Using the Python library mysqldb, you can easily insert NULL values into your MySQL database. Instead of passing an empty string or "NULL" as the value, you should pass None. Here is an example:

<code class="python">import mysql.connector

conn = mysql.connector.connect(
    host='localhost',
    user='root',
    password='password',
    database='database_name'
)

cursor = conn.cursor()

# Example 1: With a prepared statement
value = None
query = "INSERT INTO table_name (column1) VALUES (%s)"
cursor.execute(query, (value,))

# Example 2: With a string substitution
query = "INSERT INTO table_name (column1) VALUES (NULL)"
cursor.execute(query)

conn.commit()</code>

By passing None as the value, you can instruct MySQL to set the column to NULL. This approach will allow you to insert data without affecting your future data analytics.

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