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Core Data Query Language (DQL) & Filtering

Core Data Query Language (DQL) & Filtering

Discipline: Data Analyst | Module: Module 2: Enterprise Structured Query Language (SQL) & Relational Databases | Estimated Study Time: 10 Hours

Welcome to Core Data Query Language (DQL) & Filtering. This topic delivers foundational and advanced concepts designed for production engineering and real-world workflows.

Key Learning Objectives

  1. Retrieval (SELECT, SELECT DISTINCT, Column Aliasing)
  2. Row Filtering (WHERE, Logical Operators, IN, BETWEEN, LIKE, ILIKE, IS NULL)
  3. Sorting & Pagination (ORDER BY, ASC, DESC, LIMIT, OFFSET, FETCH FIRST)

Detailed Curriculum Breakdown

Retrieval (SELECT, SELECT DISTINCT, Column Aliasing)

Explore the fundamental principles, real-world patterns, and best practices for Retrieval (SELECT, SELECT DISTINCT, Column Aliasing). Practice hands-on implementations to master these concepts.

// Code Example: Retrieval (SELECT, SELECT DISTINCT, Column Aliasing)
// Implement verified patterns for production use
console.log("Mastering Retrieval (SELECT, SELECT DISTINCT, Column Aliasing)");

Row Filtering (WHERE, Logical Operators, IN, BETWEEN, LIKE, ILIKE, IS NULL)

Explore the fundamental principles, real-world patterns, and best practices for Row Filtering (WHERE, Logical Operators, IN, BETWEEN, LIKE, ILIKE, IS NULL). Practice hands-on implementations to master these concepts.

// Code Example: Row Filtering (WHERE, Logical Operators, IN, BETWEEN, LIKE, ILIKE, IS NULL)
// Implement verified patterns for production use
console.log("Mastering Row Filtering (WHERE, Logical Operators, IN, BETWEEN, LIKE, ILIKE, IS NULL)");

Sorting & Pagination (ORDER BY, ASC, DESC, LIMIT, OFFSET, FETCH FIRST)

Explore the fundamental principles, real-world patterns, and best practices for Sorting & Pagination (ORDER BY, ASC, DESC, LIMIT, OFFSET, FETCH FIRST). Practice hands-on implementations to master these concepts.

// Code Example: Sorting & Pagination (ORDER BY, ASC, DESC, LIMIT, OFFSET, FETCH FIRST)
// Implement verified patterns for production use
console.log("Mastering Sorting & Pagination (ORDER BY, ASC, DESC, LIMIT, OFFSET, FETCH FIRST)");

Practical Application & Exercises

  1. Architecture Review: Evaluate how Core Data Query Language (DQL) & Filtering integrates with upstream and downstream systems.
  2. Implementation Challenge: Build a functional prototype demonstrating each of the subtopics.
  3. Validation & Testing: Verify performance and error handling under edge-case scenarios.

Summary Checklist