Hierarchical Query

·       Introduction to Hierarchical Queries

·       Understanding Hierarchical Data

·       Parent-Child Relationships

·       CONNECT BY Clause Overview

·       START WITH Clause

·       LEVEL Pseudocolumn

·       SYS_CONNECT_BY_PATH Function

·       PRIOR Keyword Usage

·       Hierarchical Query Syntax Rules

·       Simple Parent-Child Queries

·       Multi-Level Hierarchies

·       Handling Cycles in Hierarchies

·       NOCYCLE Keyword

·       CONNECT_BY_ISLEAF Pseudocolumn

·       CONNECT_BY_ROOT Function

·       ORDER SIBLINGS BY Clause

·       Filtering Hierarchical Data

·       Aggregation in Hierarchical Queries

·       Joining Hierarchical Queries with Other Tables

·       Hierarchical Query Performance Tips

·       Recursive Subquery Factoring (WITH Clause)

·       Differences Between CONNECT BY and Recursive CTEs

·       Materialized Views with Hierarchical Data

·       Hierarchical Queries in Reports

·       Combining Hierarchical Queries with Analytic Functions

·       Hierarchical Queries in PL/SQL

·       Common Errors in Hierarchical Queries

·       Case Studies on Organizational Hierarchies

·       Hands-on Exercises with Employees/Departments Table

·       Best Practices and Optimization Techniques