Transform in ETL includesCleansingSummarizationDerivationAggregationOnly (i) and (iii)Only (iii) and (iv)Only (i),(ii), and (iii)All of the above

In the context of ETL (Extract, Transform, Load) processes, let's break down the components mentioned:

1. Cleansing: This step involves improving data quality by removing inaccuracies, duplicates, and errors.

2. Summarization: This refers to the process of creating summary reports from detailed data.

3. Derivation: This step involves creating new derived data from existing data, such as calculating new fields.

4. Aggregation: This is the process of collecting and summarizing data, often used for generating total values or averages from a set of values.

Question Analysis

Given the options, it appears we need to identify which of these processes are included in the "Transform" stage of the ETL process.

Final Answer

All of the above components (Cleansing, Summarization, Derivation, and Aggregation) are commonly included in the transformation process of ETL. Therefore, the correct answer is All of the above.