How many types of datamarts are there?
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2
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3
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4
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5
Datamarts are typically classified into two main types: Independent datamarts (created directly from operational systems without a data warehouse) and Dependent datamarts (created from a central data warehouse). Some sources mention a third type (Hybrid), but the standard answer in most ETL/data warehousing contexts is 2 types.
There are two types of data marts: independent (dependent-source, standalone, built directly from source systems for a single department) and dependent (built from a central enterprise data warehouse, ensuring consistency across marts). This two-way classification is the standard textbook answer in data warehousing courses, so "2" is correct. "3", "4", and "5" overcount by including things like hybrid marts or physical/virtual distinctions, which are implementation variations, not a separate recognized "type" in the canonical classification.