feat: Add comprehensive guide on dimensional modelling concepts

[Savvythelegend]

This PR adds a new, original documentation page that explains core dimensional modelling concepts for analytics and data warehousing. It covers fact and dimension tables, grain, star and snowflake schemas, practical SQL examples, best practices, and common pitfalls. The sidebar is updated so the new page appears under the SQL Advanced section.

Fixes #1026

Type of Change

• New feature (new docs page)
• Bug fix (non-breaking change)
• UI/UX improvement
• Performance optimization
• Documentation update
• Other (please specify):

Changes Made

• Added docs/sql/SQL-Advance/dimensional-modelling.md — complete, original guide with examples and recommendations
• Updated sidebars (sidebars.ts / relevant sidebar JSON) to include the new page under "SQL Advance"
• Created branch: feature/add-dimensional-modelling-docs
• Commit message: feat(docs): add dimensional modelling guide and update SQL Advance sidebar

Dependencies

• None. No new runtime dependencies introduced.

Checklist

• My changes follow the style guidelines of this project (markdown frontmatter and sidebar conventions)
• I have tested my changes locally (run dev server and verified page renders)
• My changes do not generate new console warnings or errors
• I ran npm run build and attached screenshot(s) in this PR
• This is already assigned Issue to me, not an unassigned issue

Notes for reviewer

• Replace Fixes Need details about dimentional modelling here. #1026 with the issue number if applicable.
• To verify locally:

  git checkout feature/add-dimensional-modelling-docs
  git pull origin feature/add-dimensional-modelling-docs
  npm run start

  • Confirm the new page appears under "SQL Advance" in the docs site navigatio

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[github-actions]

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[github-actions]

✅ Synchronized metadata from Issue #1026:

• Labels: type:doc-only, level 1, recode, hacktoberfest-accepted
• Milestone: recode:launch 3.0

[Savvythelegend]

@sanjay-kv: Could you please authorize the Vercel deployment so the preview link can be generated for review? Thanks!

[sanjay-kv]

@Savvythelegend the vercel comes with cost of $20 per new people. so if u have access means extra $20 which is not a viable method for opensource project. best way is build run n local host

[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
recode-website	Ready	Preview	Comment	Oct 24, 2025 5:55am