Dynamic column selection

[mneedham]

Summary

Checklist

• Delete items not relevant to your PR
• URL changes should add a redirect to the old URL via https://github.com/ClickHouse/clickhouse-docs/blob/main/docusaurus.config.js
• If adding a new integration page, also add an entry to the integrations list here: https://github.com/ClickHouse/clickhouse-docs/blob/main/docs/integrations/index.mdx

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[mneedham]

Resolving this issue: #3014

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[Blargian]

LGTM. Left a few comments.
I will follow up by adding these queries to sql playground so that we can use the runnable code widget rather than linking across.

[mneedham]

LGTM. Left a few comments. I will follow up by adding these queries to sql playground so that we can use the runnable code widget rather than linking across.

Sounds good. I wasn't sure how to use the runnable widget, so will see how you do it so I can do that next time.