Add comprehensive guide on SQL commands

[dinesh-2047]

Description

SQL commands and types of sql commands documentation added
Fixes #999

Type of Change

• New feature (e.g., new page, component, or functionality)
• Bug fix (non-breaking change that fixes an issue)
• UI/UX improvement (design, layout, or styling updates)
• Performance optimization (e.g., code splitting, caching)
• Documentation update (README, contribution guidelines, etc.)
• Other (please specify):

Changes Made

file created - sql-commands.md
image added - 34-sql-commands.png

Checklist

• My code follows the style guidelines of this project.
• I have tested my changes across major browsers and devices
• 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.

[vercel]

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[github-actions]

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[github-actions]

✅ Synchronized metadata from Issue #999:

• Labels: enhancement, level 1, recode, hacktoberfest-accepted
• Milestone: recode:launch 3.0

[github-actions]

✅ Synchronized metadata from Issue #999:

• Labels: enhancement, level 1, recode, hacktoberfest-accepted
• Milestone: recode:launch 3.0

[github-actions]

✅ Synchronized metadata from Issue #999:

• Labels: enhancement, level 1, recode, hacktoberfest-accepted
• Milestone: recode:launch 3.0

[github-actions]

✅ Synchronized metadata from Issue #999:

• Labels: enhancement, level 1, recode, hacktoberfest-accepted
• Milestone: recode:launch 3.0

[github-actions]

✅ Synchronized metadata from Issue #999:

• Labels: enhancement, level 1, recode, hacktoberfest-accepted
• Milestone: recode:launch 3.0

[github-actions]

✅ Synchronized metadata from Issue #999:

• Labels: enhancement, level 1, recode, hacktoberfest-accepted
• Milestone: recode:launch 3.0

[sanjay-kv]

This is repeatitive. closing this.