What is a Database?
A database is an organized collection of structured data, or information, that is stored electronically in a computer system. Databases are designed to store, retrieve, and manage data efficiently.
What is a Data Warehouse?
A data warehouse is a central repository for structured and unstructured data that is extracted from operational systems, transformed, and loaded into a database for analytical purposes. Data warehouses are designed to support business intelligence (BI) and analytics applications. They provide a consolidated view of data from multiple sources, making it easier for analysts to identify trends, patterns, and anomalies.
What is a Data Lakehouse
A data lakehouse is a unified data architecture that combines the flexibility and cost-effectiveness of a data lake with the data management and ACID transactions of a data warehouse. Data lakehouses are designed to store and process all types of data, including structured, semi-structured, and unstructured data. They provide a single platform for data scientists, analysts, and engineers to work with data in a variety of ways.
What is a Data Lake
A data lake is a repository that stores all types of data in its raw format. Data lakes are designed to store large amounts of data in a cost-effective way. They are often used to store data that is not yet well understood or that may not be needed for immediate analysis.
What is a Data Hub?
A data hub is a central repository that consolidates data from multiple sources and makes it available for a variety of purposes. Data hubs are designed to provide a single source of truth for data and to make it easier for organizations to access, analyze, and share data.
What is a Data Mart?
A data mart is a subset of a data warehouse that is designed to support a specific department or business unit. Data marts are typically smaller and more focused than data warehouses, and they often contain data that is tailored to the specific needs of the user group.
What is a data Pipeline?
A data pipeline is a set of processes that move data from one system to another. Data pipelines are typically used to extract data from source systems, transform it into a usable format, and load it into a target system.
What is Data Governance?
Data governance is the process of managing and controlling the availability, usability, integrity, and security of data. Data governance is important for ensuring that data is accurate, reliable, and compliant with regulations.
What is Data Management?
Data management is the process of collecting, storing, organizing, and using data. Data management is important for ensuring that data is used effectively and efficiently.
What is Data Warehouse Automation
Data warehouse automation (DWA) is the use of software and tools to automate the process of building and maintaining a data warehouse. Data warehouse automation can help to improve the efficiency, accuracy, and reliability of data warehouses.
What is Data Modeling
Data modeling is the process of creating a visual representation of data. Data models are used to communicate the structure and relationships of data to stakeholders. They can also be used to design and implement data warehouses, data marts, and other data storage systems.
What is Business Intelligence
Business intelligence (BI) is the process of collecting, analyzing, and transforming data into actionable insights. BI can be used to improve decision-making, identify new opportunities, and optimize business processes.
What is Structured Data?
Structured data is data that is organized in a predefined format and can be easily stored and queried. Examples of structured data include data in a database table or spreadsheet.
What is Unstructured Data?
Unstructured data is data that does not have a predefined format and cannot be easily stored or queried. Examples of unstructured data include text documents, images, and audio files.
What are Slowly Changing Dimensions?
Slowly changing dimensions are dimensions in a data warehouse that change over time. There are four main types of slowly changing dimensions:
- Type 1: Overwrite the existing value with the new value.
- Type 2: Add a new row to the dimension table with the new value and a new effective date.
- Type 3: Create a new historical record with the old value and an effective date range.
- Type 4: Merge the old value with the new value into a new record.
What is a Fact Table?
A fact table is a table in a data warehouse that stores quantitative data. Fact tables are typically used to store facts about business transactions or events.
What is a Dimension Table?
A dimension table is a table in a data warehouse that stores descriptive data. Dimension tables are typically used to store information about the entities or categories that are represented in the fact tables.
What is Data Mesh?
Data mesh is a distributed data architecture that breaks down the data warehouse into smaller, domain-specific data products. Data mesh is designed to be more scalable, flexible, and agile than traditional data warehouse architectures.