N002-E1 Tier 1 · Foundations · easy ecommerce · Brightlane

Return every product's ID, name, and price

Part of FROM and Table References in SQL

The problem

Brightlane's merchandising team is building a master price list ahead of the Q4 catalog refresh.

Write a query to return every product's ID, name, and price.

Assumptions:

  • The products table contains every item in Brightlane's catalog.
  • Each product has an id, a name, and a price recorded.

Output:

  • One row per product, with columns id, name, and price.
Schema · ecommerce 5 tables
categories
id integer
name text
parent_id? integer
products
id integer
name text
category_id integer
price numeric
stock_qty integer
attributes? jsonb
order_items
id integer
order_id integer
product_id integer
quantity integer
unit_price numeric
customers
id integer
name text
email text
city? text
country text
created_at timestamptz
is_active boolean
orders
id integer
customer_id integer
ordered_at timestamptz
status text
total_amount numeric

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Solution query
SELECT
  id,
  name,
  price
FROM
  products

The shape

FROM products points the query at the catalog table, and the three named columns in the SELECT list shape every row into the exact slice the merchandising team needs.

Clause by clause

  • SELECT id, name, price names the three columns to return, in that order. The master price list lands with id on the left, name in the middle, and price on the right — exactly the column layout the prompt asks for.
  • FROM products is the row source. PostgreSQL reads every row from the products table and hands the full population to the SELECT list. With no WHERE, every row in the catalog survives — Apex Titan 15 at $999, Vega S24 Ultra at $899, and on through the full inventory.

Why this and not SELECT *

SELECT * would also return the catalog, but with every column the products table happens to carry — category IDs, stock levels, anything else the schema includes. The refresh only needs three. Naming them keeps the result stable: if a new column gets added to products next quarter, this query still returns the same three. A SELECT * query would silently start returning the new column too, which is the kind of drift that breaks downstream consumers.

You practiced reading rows from a single table by naming it in FROM and listing the columns you want in SELECT. The SELECT … FROM skeleton is the foundation for every query you'll write in SQL.

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