SQL Flashcards

1
Q

What is a CTE?

A

CTE is a temporary result set that simplifies complex queries, enhancing readability and maintainability.

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2
Q

How is a CTE structured?

A

Defined with a WITH clause, providing a static result set without self-referencing.

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3
Q

How does a CTE behave?

A

Evaluated once, with results usable in subsequent query parts, but lacking iterative capabilities.

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4
Q

How does a recursive CTE differ from a normal CTE?

A

It self-references.
This enables iterative processing, often for hierarchical data or repetitive tasks until specified conditions are met.

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5
Q

How is a recursive CTE structured?

A

It comprises an Anchor Member (the initial query) and Recursive Member (a self-referencing query).

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6
Q

How does a recursive CTE behave?

A

It iteratively builds results until conditions are no longer met. Thus us useful for hierarchical traversal or result accumulation.

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7
Q
A
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