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  2. Cursos
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  3. Hierarchical and Recursive Queries in SQL Server
  • 1

    Recursion and Common Table Expression (CTE)

    Gratuito

    In this chapter, you will learn about recursion and why it is beneficial to apply this technique. You will also refresh your knowledge about Common Expression Tables (CTE).

  • 2

    Hierarchical and Recursive Queries

    In this chapter, you will learn about recursive CTEs, how to query hierarchical datasets, and finally, how to apply recursive CTEs on hierarchical data.

  • 3

    Creating Data Models on Your Own

    In this chapter, you will learn how to create and modify database tables. You will learn about relational and hierarchical data models, how they differ, and when each model should be used.

  • 4

    Hierarchical Queries of Real-World Examples

    In this chapter, you will practice your learnings about hierarchical and recursive querying on real-world problems, such as finding possible flight routes, assembling a car, and modeling a power grid.

Initializing

Exercicio

Create the parts list

The first step in creating a bill of material is to define a hierarchical data model. To do this, you have to create a table BillOfMaterial with the following fields:

The BillOfMaterial table describes the following hierarchy:

Your task is to define the field PartID as primary key, to define the field Cost, and to insert the following to records into the table:

  • Component: SUV, Title: BMW X1, Vendor: BMW, ProductKey: F48, Cost: 50000, Quantity: 1
  • Component: Wheels, Title: M-Performance 19/255, Vendor: BMW, ProductKey: MKQ134098URZ, Cost: 400, Quantity: 4

Instruções

100 XP
  • Define PartID as PRIMARY KEY of type INT.
  • Define Cost of type INT and not to be NULL.
  • Insert the root element SUV as described in the context section.
  • Insert the entry Wheels as described in the context section.