ThisĀ focuses on the design, creation, and management of relational databases using technologies such as SQL (Structured Query Language). It involves defining tables, establishing relationships between them, and implementing data integrity constraints.
NoSQL (Not Only SQL) databases provide an alternative approach to database development, offering scalability, flexibility, and high-performance data storage. This subcategory involves working with various NoSQL databases like MongoDB, Cassandra, or Redis, and designing data models suited for non-relational database structures.
Data warehousing involves the design and development of centralized repositories for storing and analyzing large volumes of structured and unstructured data. This subcategory focuses on building data warehouses, data marts, and ETL (Extract, Transform, Load) processes to enable efficient data analysis and reporting.
Relational Database DevelopmentĀ focuses on designing, creating, and managing relational databases. Relational databases use tables with rows and columns to store and organize data. This approach follows a structured format, where data is organized into predefined relationships between tables. Relational database development typically involves using a language called SQL (Structured Query Language) to define the database schema, create tables, establish relationships between them using primary and foreign keys, and perform data manipulation operations such as inserting, updating, and querying data. Relational databases offer robust data integrity, consistency, and the ability to perform complex queries efficiently.
NoSQL (Not Only SQL) Database Development focuses on designing and developing non-relational databases. NoSQL databases provide a flexible and scalable approach to storing and managing data, making them suitable for handling large volumes of unstructured or semi-structured data. Unlike relational databases, NoSQL databases do not follow a rigid table-based structure. Instead, they use various data models, such as key-value, document, columnar, or graph, to store and retrieve data. NoSQL database development involves selecting and implementing a suitable NoSQL database technology (e.g., MongoDB, Cassandra, Redis), designing the data model based on the specific requirements, and utilizing the appropriate data access methods for efficient data retrieval and manipulation.
Data Warehousing involves the design and development of centralized repositories that store and manage large volumes of structured and unstructured data from various sources. The purpose of data warehousing is to provide a consolidated and historical view of data that can be used for analysis, reporting, and decision-making. Data warehousing involves extracting data from operational databases and other sources, transforming and cleansing the data through ETL (Extract, Transform, Load) processes, and loading it into the data warehouse. Data warehouses typically use a dimensional data model, which organizes data into facts (numeric measurements) and dimensions (descriptive attributes). Data warehousing also involves implementing tools and technologies for data governance, data quality management, and creating business intelligence reports and dashboards for data analysis and visualization.