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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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Introduction to Prepared Statements in MySQLi

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Table of Contents What Are Prepared Statements? Why Use Prepared Statements? Security: Preventing SQL Injection Performance Benefits Understanding the Structure of Prepared Statements Steps Involved in Using Prepared Statements How to...

CRUD Operations (Create, Read, Update, Delete) in PHP with MySQLi

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Table of Contents What Are CRUD Operations? Setting Up the Database for CRUD Operations Creating Data in MySQL (Create) Inserting Data Using MySQLi Prepared Statements for Inserting Data Reading Data...

Connecting PHP with MySQL using MySQLi

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Table of Contents What is MySQLi? Why Use MySQLi for MySQL Connections? Setting Up MySQL and PHP for MySQLi Connecting to MySQL using MySQLi Using MySQLi Object-Oriented Method Using MySQLi...

Introduction to MySQL and Database Integration

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Table of Contents What is MySQL? Why Use MySQL with PHP? Setting Up MySQL and PHP Connecting PHP to MySQL Using mysqli Using PDO (PHP Data Objects) Basic MySQL Queries in...

Introduction to Debugging in PHP

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Table of Contents What is Debugging? Why Debugging is Important in PHP Common Debugging Techniques Using var_dump() Using print_r() Using echo and exit Using debug_backtrace() Debugging Tools and Extensions Xdebug Debugging with IDEs (PHPStorm,...

PHP Include & Require Statements

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Table of Contents Introduction to Include and Require Syntax of include Syntax of require Key Differences Between include and require Using include_once and require_once Best Practices for Using Include and...

Introduction to Error Handling in PHP

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Table of Contents Introduction to Error Handling Types of Errors in PHP Syntax Errors Runtime Errors Logic Errors Error Reporting in PHP error_reporting() ini_set() Displaying Errors Handling Errors with try-catch Block Syntax of try-catch Throwing Exceptions Custom...

File Handling in PHP

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Table of Contents Introduction to File Handling in PHP File System Functions Opening Files Reading Files Writing Files Closing Files File Permissions Uploading Files File Handling Functions: fopen(), fread(), fwrite(), fclose() Working with Directories Error...

Forms and User Input in PHP

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Table of Contents Introduction to Forms in PHP Basics of HTML Forms Handling Form Data in PHP $_GET vs $_POST Validating User Input Sanitizing User Input Handling Multiple Form Elements Handling File...

Superglobals in PHP – $_GET, $_POST, $_REQUEST, $_SERVER

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Table of Contents Introduction to Superglobals What Are Superglobals? Overview of Common Superglobals $_GET $_POST $_REQUEST $_SERVER Working with $_GET Working with $_POST Using $_REQUEST to Access Data Accessing Information with $_SERVER Practical Use Cases for...

Arrays in PHP – Indexed, Associative, and Multidimensional Arrays

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Table of Contents Introduction to Arrays in PHP Why Use Arrays? Indexed Arrays Associative Arrays Multidimensional Arrays Array Functions in PHP Traversing Arrays in PHP Modifying Arrays Best Practices for Using Arrays Common Mistakes...

Functions in PHP – Creating Reusable Logic

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Table of Contents Introduction to Functions Why Use Functions? Defining a Function in PHP Function Parameters and Return Values Default Parameters Variable Scope in Functions Anonymous Functions (Lambda Functions) Returning Multiple Values...
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