SQL CTE Interview Questions What is Anchor member and Recursive member #sqlinterviewquestions

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SQL CTE Interview Questions What is Anchor member and Recursive member

In SQL Common Table Expressions (CTEs), an anchor member defines the initial result set, acting as the starting point for recursion. It typically retrieves base-level data. Conversely, a recursive member contributes additional rows to the result set by referencing the CTE itself, creating a recursive iteration. Together, these components form a recursive CTE, enabling the construction of hierarchical or interconnected structures within the same dataset. The anchor establishes the foundation, while the recursive member builds upon it iteratively, producing a comprehensive result set.

SQL interview preparation involves understanding basic concepts such as queries, joins, and database design. Questions may cover real-world scenarios, production support, and data engineering. Familiarity with SQL Server, joins, and common functions like substring is essential. Topical knowledge includes auto-incrementing, querying, and addressing tricky scenarios. SQL interview series typically covers 50 questions, emphasizing practical problem-solving. It's vital to grasp the basics, tackle tricky scenarios, and comprehend database-related challenges. Success requires a strong foundation in SQL, demonstrating proficiency in handling various database tasks and scenarios.