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  3. Introduction to Data Modeling in Snowflake
  • 1

    Fundamentals of Data Modeling

    Free

    Embark on a foundational exploration of data modeling with Snowflake and uncover the art of organizing data efficiently. Start with the basics of data modeling concepts, understand its significance in a data-driven world, and learn how to represent and store data effectively. By visualizing data organization on a vast scale, you'll grasp the importance of a well-structured data model in simplifying data querying and analysis.

  • 2

    Data Relationships and Normalization

    Free

    Unlock the secrets of effective data organization and management, focusing on the critical roles of keys in data relationships and the fundamental principles of data normalization within Snowflake. Delve into the foundational aspects of relational data, emphasizing the importance of primary and foreign keys in structuring and linking data entities. Embark on a journey through the normalization process, starting with 1NF to eliminate duplicate data, advancing to 2NF to address partial dependencies, and culminating in 3NF to remove transitive dependencies.

  • 3

    Data Modeling Techniques for Data Warehouse

    Venture deeper into data warehousing strategies with Snowflake, exploring three pivotal data modeling approaches: Entity–Relationship Model, Dimensional Modeling, and Data Vault. Begin by mapping complex relationships within a university system using the Entity–Relationship model, which is perfect for visualizing data interactions. Transition into Dimensional Modeling to simplify data analysis through fact and dimension tables, ideal for insightful reporting. Then, delve into Data Vault modeling for a robust framework that excels in historical data tracking and flexibility.

  • 4

    Snowflake Components

    Unlock the potential of Snowflake's architecture to optimize query performance, enhancing the speed and efficiency of your data models. Explore the advantages of columnar storage, Massively Parallel Processing (MPP), and micro-partitions in Snowflake, contrasting them with traditional databases for a clear understanding of Snowflake's superior performance. Delve into Snowflake's data objects—virtual warehouses, tables, views, and more—to smartly organize your data. Master techniques such as query optimization, the use of subqueries, and Common Table Expressions (CTEs) to streamline data processing.

Initializing

Exercise

Creating links

The final piece in the data vault model for HR is the creation of Links. Links represent relationships between hubs or capture transactions and interactions involving multiple hubs.

Your task is creating a link entity representing the relationship or interaction between the employee, training, and department hubs.

Instructions 1/3

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  • Create a link_all entity, with an attribute link_key as an autoincrement number to be the entity's unique identifier.
  • Include the attributes load_date, with datatype TIMESTAMP, and record_source as characters of 255 long, to track history of the records.