2 Advantages of CTE: Improved Query Readability:

CTEs help break down complex queries into smaller, more manageable parts, making the code easier to read and maintain. This is especially helpful when dealing with complicated joins or subqueries, as you can isolate the logic in a CTE and refer to it later in the main query. Reusability within a Query:

2 Disadvantages of CTE: You can reference the same CTE multiple times within a single query, which avoids the need to repeat complex logic. This makes the query more efficient and cleaner since you define the logic once and use it wherever needed.

Performance Issues with Large Data:

CTEs are recalculated each time they are referenced, which can lead to performance overhead, especially when dealing with large datasets. This can be less efficient compared to using temporary tables, which may persist in memory or be indexed for faster access. Limited Scope:

CTEs are only available within the query in which they are defined. Once the query is completed, the CTE is discarded. This means you can't reuse the result of a CTE across different queries or sessions.