SQL
Advanced queries, analytics, execution plans, and performance tuning for massive retail datasets.
Published Guides
SQL Architecture: CTEs vs. Global Temporary Tables (GTTs)
A comprehensive guide on when to use Common Table Expressions (CTEs/WITH clause), Global Temporary Tables (GTTs), and Private Temporary Tables in Oracle SQL. Understand memory overhead, undo/redo generation, and performance implications.
Advanced SQL Analytics: Row Pattern Matching (MATCH_RECOGNIZE)
Master Oracle SQL's MATCH_RECOGNIZE clause. Learn how to perform complex row pattern matching, detect trends, sessionize data, find consecutive gaps, and analyze time-series data without procedural PL/SQL code.
SQL Masterclass: Mastering the Oracle Data Dictionary
Learn how to query Oracle's metadata using ALL_, DBA_, and V$ views. Discover how to dynamically generate scripts and troubleshoot database performance.
SQL Performance: Mastering Execution Plans & The Cost-Based Optimizer (CBO)
A definitive guide to SQL Performance Tuning. Master the Oracle Cost-Based Optimizer (CBO), read EXPLAIN PLANs, analyze access paths (Full Table Scans, Index Range Scans), understand join methods (Nested Loops, Hash Joins), and learn how to rewrite slow queries using real-world AWR/ASH metrics.
SQL Masterclass: Table Partitioning Strategies for VLDB
Master Oracle Table Partitioning for Very Large Databases (VLDB). Learn Range, Hash, and List partitioning strategies to enable partition pruning and dramatically accelerate queries.
SQL Masterclass: Materialized Views & Query Rewrite
Accelerate your data warehouse dashboards using Oracle Materialized Views. Learn about Fast Refresh, ON COMMIT refreshes, and how to configure Query Rewrite to intercept and speed up user queries automatically.
Oracle SQL Analytical Functions Deep Dive
Master Oracle Window and Analytical Functions. Learn how to use OVER(), PARTITION BY, ROW_NUMBER(), RANK(), LEAD(), and LAG() for complex reporting.
SQL Masterclass: JSON & XML Processing in Oracle
Learn how to natively generate, parse, and query JSON and XML payloads directly within Oracle SQL without needing a middle-tier application.
SQL Masterclass: Hierarchical Queries
Master Oracle SQL hierarchical queries. Learn how to traverse trees and graphs using START WITH ... CONNECT BY, SYS_CONNECT_BY_PATH, and CONNECT_BY_ISLEAF to query organizational charts and BOMs.
RC:OMS
Multi-channel order management with double-entry inventory ledger. Amazon, Flipkart, Shopify, WooCommerce — one source of truth.
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