Technical Details

HTML5 table semantics: thead/tbody for structure, th scope attributes for accessibility. Escape &, <, > in content. Optional: CSS classes, inline styles, data attributes. Consider responsive design for wide tables.

Common Use Cases

1. Web Reports: Display database data on web pages.
2. Email Reports: Generate HTML tables for email newsletters.
3. Documentation: Create data tables for technical docs.
4. Quick Visualization: View query results in browser.

Code Examples

SQL to HTML Table

function escapeHTML(str) {
  if (str === null) return '<em class="null">NULL</em>';
  return String(str)
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;');
}

function sqlToHTML(columns, rows, options = {}) {
  const className = options.className || 'data-table';

  let html = `<table class="${className}">\n<thead>\n<tr>\n`;
  columns.forEach(col => {
    html += `  <th scope="col">${escapeHTML(col.name)}</th>\n`;
  });
  html += '</tr>\n</thead>\n<tbody>\n';

  rows.forEach(row => {
    html += '<tr>\n';
    row.forEach(val => {
      html += `  <td>${escapeHTML(val)}</td>\n`;
    });
    html += '</tr>\n';
  });

  html += '</tbody>\n</table>';
  return html;
}

Create semantic HTML table with proper escaping. Add classes for styling.

Tips & Best Practices

• Always escape HTML content
• Use semantic thead/tbody
• Add scope to th elements
• Consider responsive design
• Style NULLs distinctively

Common Mistakes to Avoid

• Not escaping HTML (XSS risk)
• Missing thead/tbody structure
• No accessibility attributes
• Tables too wide for mobile

When to Use This Tool

Use SQL to HTML for web reports, email newsletters, documentation tables, and any web-based data display.

Frequently Asked Questions

How do I style the table?

Add CSS classes to table, tr, th, td elements. Or use inline styles for email compatibility. Bootstrap, Tailwind, or custom CSS can enhance appearance.

How do I handle NULL values?

Display as empty cell, "N/A", "-", or styled differently (gray italic). Consistent handling improves readability.

What about very wide tables?

Use responsive techniques: horizontal scroll wrapper, hide less important columns on mobile, or transpose to vertical layout. CSS overflow-x: auto helps.

Should I escape HTML in data?

Yes! Always escape user data to prevent XSS. Convert & → &, < → <, > → >. Never trust database content.

Get Started

Ready to try SQL To HTML? Use the tool now - it's free, fast, and works right in your browser.

Last updated: June 27, 2026