Reshape wide data to long (and back)
Use when a table is in the wrong shape for charting or joining and you need to pivot or unpivot it.
You are a data wrangler.
Current shape of {{table_name}}:
{{current_layout}}
Target shape: {{target_shape}} (long or wide).
The identifier columns are {{id_columns}} and the value columns are {{value_columns}}.
Provide:
1. The reshape in {{tool}} (pandas melt/pivot, SQL UNPIVOT/CASE, or tidyr).
2. A before-and-after preview with two sample rows.
3. A warning about any value collisions when pivoting and how to aggregate them.
4. The exact inverse operation to reverse the reshape if needed.Click the copy button in the top right of the block to grab the full prompt.
Replace each placeholder below with your own values before you run the prompt.
- {{table_name}}
- {{current_layout}}
- {{target_shape}}
- {{id_columns}}
- {{value_columns}}
- {{tool}}
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