Background
Part of the process when looking for candidates to bring into a data warehouse team is to ensure that you hire competent and reliable people. We recently had to fill a data warehouse position in our team and I setup the following technical exercise that helps measure technical competencies of candidates. Candidates were required to do the exercise at their own time but return to us the solution within 3 days after having been given the exercise.
Skills Measured
- Requirements Analysis & Documentation
- Dimensional Modelling
- SQL Server Server Transact SQL (T-SQL) Development
- SQL Server Integration Services (SSIS) Development
- SQL Server Reporting Services (SSRS) Report Development
- SQL Server Analysis Services (SSAS) Development
- Technical Solution Documentation
OLTP Data Source
[table id=3 /]
Exercise 1
- Design, setup ETL (using SSIS – either using BIDS or SSDT) and populate a Fruits Data Mart. The mart should have the following:
- Dimensions:
- DimFruit
- DimCustomer
- DimMOP
- Fact:
- FactSales
- Dimensions:
- Produce a dimensional star-schema model of your Fruits Data Mart
Exercise 2
- Produce an SSRS Report which source data from Fruits Data Mart with a following business case:
- As a user, I would like a breakdown of total quantities of fruits purchased by customer
- I would also like to filter on Fruit name
Exercise 3
- Setup a FruitSales Cube with all dimensions from Fruits Data Mart
- In the same cube, FruitSales, setup an MOP hierarchy – with one level – MOP
- In the same cube, FruitSales, setup a calculated member titled DerivedQuantities which multiplies quantities of all fruits by 2
Exercise 4
- Produce an Excel Pivot Table Report which source data from FruitSales Cube with a following business case:
- As a user, I would like a breakdown of DerivedQuantities of fruits purchased by customer
- I would also like to filter on pivot using an MOP Slicer