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SQL for Financial Analytics: Profit & Loss Reporting, Forecasting, and Ratio Analysis

Table of Contents Introduction Importance of SQL in Financial Analysis Core Financial Statements in Data Tables Building a Profit & Loss (P&L) Report in SQL Structuring Accounts: Revenue vs...
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Data Warehousing Concepts in SQL: Understanding Star and Snowflake Schemas

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SQL with APIs and JSON Fields in PostgreSQL: Working with Semi-Structured Data

Table of Contents Introduction Why JSON Support Matters in Modern SQL PostgreSQL JSON vs JSONB Creating Tables with JSON Fields Inserting JSON Data (from APIs or files) Accessing JSON Properties...
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SQL for Data Engineering: ETL Concepts and Building Scalable Data Pipelines

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Working with JSON in SQL: Storing, Querying, and Manipulating JSON Data

Table of Contents Introduction Why Use JSON in SQL Databases? Storing JSON Data in Tables JSON Data Types and Columns Basic JSON Syntax Inserting JSON Values Retrieving JSON Data Accessing JSON Fields...

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Error Handling in SQL: Managing Exceptions and Ensuring Reliable Transactions

Table of Contents Introduction Why Error Handling Matters in SQL Types of Errors in SQL Syntax Errors vs Runtime Errors Understanding Transaction Errors Rollbacks for Safe Error Recovery Error Handling in...

Stored Procedures and Functions in SQL: Encapsulating Logic for Reuse and Automation

Table of Contents Introduction What Are Stored Procedures and Functions? Benefits of Using Stored Routines Stored Procedures vs Functions: Key Differences Syntax for Creating Stored Procedures Executing a Stored Procedure Parameters...

Triggers in SQL: Automating Database Behavior

Table of Contents Introduction What Is a Trigger in SQL? Why Use Triggers? Types of Triggers Syntax of a Trigger BEFORE vs AFTER Triggers INSERT, UPDATE, and DELETE Triggers Trigger Events: Row-Level...

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Strings: Advanced Manipulation and Best Practices

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Table of Contents Introduction Basic String Manipulation Recap Advanced String Manipulation Techniques String Formatting with f-strings String Encoding and Decoding Regular Expressions for String Matching Multi-line Strings and String Joining String Slicing...

Collections Module in Python: defaultdict, namedtuple, Counter

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Table of Contents Introduction What is the collections Module? defaultdict in Python Definition and Use Cases Implementing defaultdict namedtuple in Python Definition and Use Cases Creating and Using namedtuple Counter in Python Definition and...

Working with Stack, Queue, Heap, and Deque in Python

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Table of Contents Introduction What Are Data Structures in Python? Stacks in Python Definition and Use Cases Stack Implementation Using List Stack Implementation Using collections.deque Queues in Python Definition and Use Cases Queue...

Comprehensions in Python: List, Dictionary, and Set Comprehensions Masterclass

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Table of Contents Introduction What Are Comprehensions in Python? List Comprehensions Syntax and Basic Examples Conditional List Comprehensions Nested List Comprehensions Dictionary Comprehensions Syntax and Basic Examples Conditional Dictionary Comprehensions Set Comprehensions Syntax and Basic...

Dictionaries and Nested Data in Python: A Comprehensive Guide

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Table of Contents Introduction What is a Dictionary in Python? Creating and Accessing Dictionaries Modifying Dictionaries: Adding, Updating, and Deleting Items Dictionary Methods and Operations Nested Dictionaries Use Cases for Dictionaries...

Sets and Frozensets in Python: Understanding Their Characteristics and Use Cases

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Table of Contents Introduction What is a Set in Python? Creating Sets Set Operations: Union, Intersection, Difference Characteristics of Sets When to Use Sets What is a Frozenset? Differences Between Sets and...

Tuples and When to Use Them in Python

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Table of Contents Introduction What is a Tuple? Creating Tuples Accessing Tuple Elements Tuples vs Lists: Key Differences When to Use Tuples Immutability in Tuples Nested Tuples Tuple Operations Performance Considerations with Tuples Conclusion Introduction In Python,...

Lists and Advanced List Operations in Python

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Table of Contents Introduction Understanding Python Lists Creating Lists Accessing List Elements List Slicing Techniques Modifying Lists List Methods (append, extend, insert, remove, pop, etc.) List Comprehensions (Deep Dive) Advanced List Operations Nested Lists...

Comments, Docstrings, and Documentation Standards in Python

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Table of Contents Introduction Importance of Code Documentation Writing Effective Comments Best Practices for Comments Understanding Docstrings Docstring Conventions (PEP 257) Single-line vs Multi-line Docstrings Tools for Generating Documentation from Docstrings Documentation Standards...

Python Code Style (PEP8) and Formatters (black, isort)

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Table of Contents Introduction What is PEP8 and Why Does It Matter? Key Guidelines from PEP8 Common Violations and Mistakes Introduction to Code Formatters Overview of black Formatter Overview of isort...

Custom Exceptions and Best Practices in Python

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Table of Contents Introduction What Are Custom Exceptions? Why Create Custom Exceptions? How to Define Custom Exceptions in Python Adding Custom Behavior to Exceptions Inheriting from Built-in Exception Classes Using __str__...

Exception Handling in Python: Mastering try, except, and finally

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Table of Contents Introduction What are Exceptions in Python? Why Handle Exceptions? Basic Exception Handling Using try and except Catching Specific Exceptions Using else and finally Blocks Nested Try-Except Blocks Raising Exceptions...
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