DABCC study materials
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DABCC key terms

DABCC · Get comfortable with the vocabulary.

Data Stewardship

The operational, day-to-day accountability for data assets, carried out by business and technical stewards who enforce policies, resolve quality issues, and approve changes within their assigned domains.

Related: Data Governance, Data Owner, Data Quality Dimensions
Data Governance

The decision-making framework of policies, roles, and processes that determines who can take what action on which data, under what circumstances, using which methods.

Related: Data Stewardship, Data Policy, Data Lineage
Data Owner

The accountable executive or business leader who has authority over a data domain, approves access and usage decisions, and accepts responsibility for the data's fitness for purpose.

Related: Data Stewardship, Data Custodian, Role-Based Access Control
Data Custodian

The technical role responsible for storing, securing, backing up, and operating data systems according to the rules set by data owners and stewards, without owning business meaning.

Related: Data Owner, Data Stewardship, Encryption at Rest
Data Policy

A formal statement of principles and mandatory rules that directs how data is acquired, used, protected, retained, and disposed of across the organization.

Related: Data Governance, Data Retention Policy, Data Classification
Data Classification

The process of assigning sensitivity labels such as public, internal, confidential, or restricted to data so that controls and handling rules can be applied consistently.

Related: Data Policy, Personally Identifiable Information (PII), Encryption at Rest
Data Retention Policy

Rules that specify how long each category of data must be kept, where it is stored, and when and how it must be securely destroyed or archived.

Related: Data Policy, Data Archiving, Data Purging
Conceptual Data Model

A high-level, technology-independent representation of business entities, their relationships, and key concepts, used to align stakeholders before physical design begins.

Related: Logical Data Model, Physical Data Model, Entity-Relationship Diagram
Logical Data Model

A detailed model of entities, attributes, relationships, and business rules that is independent of any specific database product but precise enough to guide physical design.

Related: Conceptual Data Model, Physical Data Model, Normalization
Physical Data Model

The implementation-level design of tables, columns, keys, indexes, partitions, and storage structures for a specific database platform, derived from the logical model.

Related: Logical Data Model, Normalization, Star Schema
Normalization

The process of structuring relational tables to reduce redundancy and update anomalies by organizing attributes into progressively stricter normal forms.

Related: Denormalization, Logical Data Model, Primary Key
Denormalization

The deliberate introduction of redundancy into a data model, typically to improve query performance or simplify reporting, at the cost of update complexity.

Related: Normalization, Star Schema, Data Mart
Star Schema

A dimensional model in which a central fact table containing measures and foreign keys is joined to surrounding dimension tables that describe the business context.

Related: Snowflake Schema, Fact Table, Dimension Table
Snowflake Schema

A dimensional model in which dimension tables are normalized into multiple related tables, reducing redundancy but increasing the number of joins required.

Related: Star Schema, Normalization, Dimension Table
Fact Table

A table in a dimensional model that stores quantitative measures and foreign keys referencing dimension tables, typically at a defined grain of business activity.

Related: Dimension Table, Star Schema, Grain
Dimension Table

A table in a dimensional model that holds descriptive attributes used to filter, group, and label facts, such as customer, product, date, or geography.

Related: Fact Table, Star Schema, Slowly Changing Dimension
Grain

The level of detail represented by a single row in a fact table, such as one row per order line or one row per customer per day.

Related: Fact Table, Aggregation, Granularity
Slowly Changing Dimension (SCD)

A dimension design technique for tracking attribute changes over time, commonly using Type 1 overwrite, Type 2 versioned rows with effective dates, or Type 3 prior-value columns.

Related: Dimension Table, Data Lineage, Effective Date
ETL (Extract, Transform, Load)

A data integration pattern that extracts data from source systems, transforms it to meet target requirements, and loads it into a data warehouse or other target.

Related: ELT (Extract, Load, Transform), Data Pipeline, Data Staging Area
ELT (Extract, Load, Transform)

A data integration pattern that loads raw source data into a target platform first and performs transformations there, leveraging the target's scalable compute.

Related: ETL (Extract, Transform, Load), Data Pipeline, Data Lake
Data Pipeline

An automated sequence of steps that moves and transforms data from sources to targets, including scheduling, error handling, monitoring, and dependency management.

Related: ETL (Extract, Transform, Load), Data Lineage, Batch Processing
Data Staging Area

An intermediate storage zone where extracted source data is landed and prepared before transformation and loading into the target warehouse or mart.

Related: ETL (Extract, Transform, Load), Data Pipeline, Data Landing Zone
Change Data Capture (CDC)

A technique for identifying and delivering only the inserts, updates, and deletes that occurred in a source system since the last extraction, reducing load volume and latency.

Related: Incremental Load, Data Pipeline, Watermark
Incremental Load

A loading strategy that processes only new or changed records since the previous run, in contrast to a full load that replaces the entire target data set.

Related: Change Data Capture (CDC), Full Load, Watermark
Idempotency

A property of a data process whereby rerunning the same job with the same input produces the same result without duplicating records or corrupting state.

Related: Data Pipeline, Incremental Load, Data Reconciliation
Data Quality Dimensions

Measurable characteristics used to assess data fitness, commonly including completeness, accuracy, consistency, timeliness, validity, and uniqueness.

Related: Data Profiling, Data Quality Rule, Data Cleansing
Data Profiling

The analytical examination of data to discover structure, value distributions, null rates, uniqueness, patterns, and anomalies before defining quality rules or integration logic.

Related: Data Quality Dimensions, Data Quality Rule, Data Cleansing
Data Quality Rule

A precise, testable condition that data must satisfy, such as a mandatory field, a valid value range, a referential constraint, or a uniqueness requirement.

Related: Data Quality Dimensions, Data Profiling, Data Cleansing
Data Cleansing

The process of detecting and correcting or removing inaccurate, incomplete, duplicated, or malformed records to improve data fitness for downstream use.

Related: Data Quality Rule, Data Profiling, Data Standardization
Data Standardization

The application of consistent formats, codes, and reference values to data, such as normalizing addresses, dates, country codes, and units of measure.

Related: Data Cleansing, Reference Data, Master Data Management (MDM)
Personally Identifiable Information (PII)

Data that can identify a specific individual directly or in combination with other data, such as names, government identifiers, contact details, or biometric records.

Related: Data Classification, Data Masking, Data Anonymization
Data Masking

The process of replacing sensitive values with realistic but altered values so that non-production users or analysts can work without seeing the original data.

Related: Data Anonymization, Personally Identifiable Information (PII), Tokenization
Data Anonymization

The irreversible transformation of data so that individuals can no longer be identified, including techniques such as generalization, suppression, and perturbation.

Related: Data Masking, Personally Identifiable Information (PII), Pseudonymization
Role-Based Access Control (RBAC)

An access control model in which permissions are assigned to roles and users receive access by being placed in the appropriate roles.

Related: Data Owner, Least Privilege, Data Classification
Least Privilege

The security principle that users and processes should receive only the minimum access rights necessary to perform their assigned tasks, for only as long as needed.

Related: Role-Based Access Control (RBAC), Data Classification, Data Custodian
Data Lineage

The documented path of data from its origin through transformations to its destination, used for impact analysis, root-cause investigation, and regulatory traceability.

Related: Metadata, Data Pipeline, Data Provenance
Metadata

Data that describes other data, including technical structures, business definitions, ownership, lineage, quality metrics, and usage information.

Related: Data Lineage, Data Dictionary, Business Glossary
Business Glossary

A curated collection of business terms with agreed definitions, owners, and relationships, used to establish shared meaning across systems and reports.

Related: Metadata, Data Dictionary, Master Data Management (MDM)
Master Data Management (MDM)

The discipline and supporting technology for creating and maintaining consistent, authoritative records for core entities such as customers, products, suppliers, and employees.

Related: Reference Data, Data Standardization, Golden Record
Golden Record

The single, trusted, and authoritative version of a master data entity assembled from multiple sources through matching, merging, and survivorship rules.

Related: Master Data Management (MDM), Data Standardization, Data Quality Dimensions