Write a Python code to create a database file and a table named 'Student_Details with three columns, 'Roll No, 'Student Name' and 'Student Class'. Support your code with suitable comments
# import the SQLite module
import sqlite3
# Create a connection to the database file
conn = sqlite3.connect('students.db')
# Create a table named 'Student_Details' with three columns, 'Roll No', 'Student Name' and 'Student Class'
cur = conn.cursor()
cur.execute("CREATE TABLE Student_Details (Roll_No INT, Student_Name TEXT, Student_Class TEXT)")
# Commit changes and close the connection to the database
conn.commit()
conn.close()
# The above code will create the database file 'students.db' and the table 'Student_Details' with the given columns.
Is it full answer
Yes, the above code creates a database file named 'students.db' and a table named 'Student_Details' with three columns: 'Roll_No', 'Student_Name', and 'Student_Class'. The code establishes a connection to the database, creates a cursor object, executes the SQL statement to create the table, and commits the changes. Finally, the connection to the database is closed.
Certainly! Here's a Python code that creates a database file and a table named 'Student_Details' with three columns: 'Roll No', 'Student Name', and 'Student Class'. I have added comments to explain each step:
```python
import sqlite3
# Connect to the SQLite database or create if it doesn't exist
connection = sqlite3.connect('student.db')
# Create a cursor object to execute SQL queries
cursor = connection.cursor()
# Create a table named 'Student_Details' with three columns
cursor.execute('''CREATE TABLE IF NOT EXISTS Student_Details
(Roll_No INTEGER,
Student_Name TEXT,
Student_Class TEXT)''')
# Commit the changes to the database
connection.commit()
# Close the connection
connection.close()
```
Explanation:
1. First, we import the `sqlite3` module, which provides the functionality to work with SQLite databases.
2. We establish a connection to the database file `student.db` using the `connect()` function. If the database file doesn't exist, it will be created.
3. Then, we create a cursor object `cursor` to execute SQL queries on the database.
4. We use the `execute()` method on the cursor object to execute an SQL query. In this case, we create a table named 'Student_Details' with three columns: 'Roll_No' of integer type, 'Student_Name' of text type, and 'Student_Class' of text type.
5. After executing the CREATE TABLE query, we use the `commit()` method to save the changes permanently to the database.
6. Finally, we close the database connection using the `close()` method.
Note: It is a good practice to commit changes and close the connection after executing the required queries to ensure data integrity and memory efficiency.