Python File Handling To open and handle files in Python, you can follow the steps below: Open a FileUse the open() function, specifying the filename and mode: file = open(‘filename’, ‘mode’) Specify the ModeChoose a mode, such as ‘r’ for reading or ‘w’ for writing. Reading or Writing to the FileTo read or write, use: …

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Changing and Getting Working Directory in Python To work with directories in Python, you need to use the os module. Here’s how you can get and change the current working directory: Getting the Current Working Directory import os # Get the current working directory current_directory = os.getcwd() print(‘Current Directory:’, current_directory) Changing the Current Working Directory …

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Topics Covered in File Handling in Python Introduction to File Handling in Python Definition of a File & Different Types of Files Opening Files using the open() Function Using the with Statement for File Operations File Access Methods Reading Data from a File Writing Data to a File Input, Output, and Error Streams in Python …

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SQL Join Types INNER JOIN An INNER JOIN returns records that have matching values in both tables. Tables: Customers   ID Name 1 John Orders   OrderID CustomerID 1 1 SQL Query: SELECT Customers.Name, Orders.OrderID FROM Customers INNER JOIN Orders ON Customers.ID = Orders.CustomerID; LEFT JOIN A LEFT JOIN returns all records from the left …

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  1. DeleteTable Row Explanation: The DELETE statement is usedto delete existing records in a table. Be cautious when using thiscommand as it removes data permanently. Example: DELETE FROM table_name WHERE condition;Use Case: To delete a record with the id of 5 from the students table: DELETE FROM students WHERE id = 5; 2. Drop …

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Creating and Inserting Data into a MySQL Table Creating a MySQL Table Before inserting data, you’ll need to create a table to hold it. Here’s how to create a table named students. SQL Query for Creating a Table: CREATE TABLE students (id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(50), age INT, email VARCHAR(50)); Inserting Data Into …

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MySQL Data Types with Examples Numeric Data Types Numeric Data TypesIn MySQL, numeric data types are used to store numeric values. They can be categorized into exact numeric types, like INTEGER, and approximate numeric types, like FLOAT. Data Type Description Example INT A normal-size integer that can be signed or unsigned. INT(11) FLOAT A floating-point …

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Basic MySQL Commands with Examples 1. Connecting to a Database To connect to a MySQL database, use the following command: mysql -u username -p 2. Show Databases To show the list of all available databases: SHOW DATABASES; 3. Use a Database To use a specific database: USE database_name; 4. Create a Database To create a …

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