I’m learning to read database from vercel from this tutorial (@vercel/postgres).

In a simple array, I manage to call simple arrays using var.map, but how to do it when I want to use vercel postgres?

this is my current effort, trying to display data from vercel

import { createClient } from '@vercel/postgres';
 
export async function queryPosts(request: Request) {
  const { searchParams } = new URL(request.url);
  const petName = searchParams.get('petName');
  const client = createClient();
  await client.connect();
 
  try {
    const { rows, fields } =
      await client.sql`SELECT * FROM pets WHERE name > ${petName};`;
  } finally {
    await client.end();
  }
} 

How to call data using url similar to add-data example/tutorial?