Spot a repeated key

Scenario

You are a data architect in the Construction team. A repeated key means two rows are pretending to be the same thing. We will map it using the site_jobs dataset.

Question

Write your architecture code in the editor, study the picture, then change one label and run it again.

Your task

Read the five labelled architecture parts
Press Check my answer
Use the picture to explain where the data goes

Primary keysData Architecture

Read the simple theory: Primary keys

Beginner · Quality Gated Architecture & Primary Keys — question 1 of 30

Finish all 30 to earn a certificate

1. Choose your dataset

Pick an industry and a size. Your code and results change to match.

IndustrySize

📓 DataPro notebookarchitecture-006.ipynbFileEditViewRunKernel: Python 3

[md]

Spot a repeated key

Write your architecture code in the editor, study the picture, then change one label and run it again.

In [1]:

Your code cell is below. Press Check my answer to run the cell — the result appears as Out [1].

python editorsite_jobs

Snippets

💡 Explain my whole code, line by line (hover any word in the editor for a tip)

🌈 In short — no coding words

📂 Opens the "site_jobs" table→✅ Shows you the answer

Altogether: this script runs top to bottom, one line at a time, building up the answer step by step.

Start typing to see suggestions. Press Enter to use one. Red marks show the line to fix. Drag a bottom corner horizontally and vertically to resize.

Type your code here ↓Tap or click inside the box to start

✍️ Tap here to type

Dataset & schema

site_jobs

IndustryDataset size

The tiny starter data. Bigger data scrolls.

Fields

job_id	site	workers
J1	Bridge	10
J2	School	6
J3	Bridge	14
J4	Road	8

Construction architecture practice data only.

attempts: 0

▶ Output terminal

$ Press “Check my answer” — results appear here.

Your next steps

Each item turns green when your answer includes it.

5 left

Names the source
Names storage
Names access
Names governance
Shows the architecture