Keep Solar or Wind

Scenario

You are a data analyst in the Energy team. IN checks if a value is in a short list — like a guest list.

Question

Write your code in the editor, look at the result, then try changing one small thing.

Your task

Write your code in the editor
Press Check my answer
Look at the result on the right

Read the simple theory: Data cleaning

Advanced · Duplicate Removal & Result Sampling — question 5 of 20

Finish all 20 to earn a certificate

1. Choose your dataset

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

IndustrySize

sql editorpower_readings

Snippets

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

🌈 In short — no coding words

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

Altogether: this query reads your industry table, picks what you need, and shows the answer as rows.

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

power_readings

IndustryDataset size

The tiny starter data. Bigger data scrolls.

Fields

reading_id	plant	megawatts
E1	Solar	40
E2	Wind	55
E3	Solar	35
E4	Hydro	70

Energy 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.

1 left

Uses IN (...)