A data analyst joins a project and is tasked with creating a report from a customer database they have never used before. To properly interpret the data, the analyst needs to understand the definitions of each field, their data types (e.g., string, integer, date), and any constraints, such as 'cannot be null'.
Which of the following documents would be the MOST direct and comprehensive resource for this specific information?
The correct answer is a data dictionary. A data dictionary is a centralized repository of metadata that contains detailed information about data elements. This includes the names, business definitions, data types, formats, and constraints for each field in a database, making it the essential resource for the task described.
A data flow diagram is incorrect because it graphically represents how data moves through a system, but it does not detail the specific attributes of each data field.
A data lineage report is incorrect because it traces the origin, movement, and transformations of data over time, rather than providing a static definition of the data fields themselves.
A hierarchy structure diagram is incorrect because it illustrates parent-child relationships between data entities, showing how they are organized, but it lacks the detailed field-level definitions found in a data dictionary.
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What is a data dictionary?
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What types of constraints might exist in a database, and how are they described in a data dictionary?
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How does a data dictionary differ from a data flow diagram or data lineage report?
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CompTIA Data+ DA0-002 (V2)
Data Governance
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