---
title: "Create a view"
sidebarTitle: "Create View"
description: "Define a derived dataset as a saved query, with no storage or refresh of its own."
icon: eye
keywords: ["view", "create view", "feature engineering", "saved query"]
availability:
  embedded: unavailable
  enterprise: available
---

A view is the lightest way to derive a feature-engineered dataset: it stores
a **query**, not rows, so there is nothing to refresh and nothing that can
fall out of date. Reach for one before
[a computed column](/feature-engineering/add-computed-column) or
[a materialized view](/feature-engineering/materialized-views) when the
underlying query is cheap enough to simply re-run on every read.

## Define a view {#create}

A view over a products table, selecting and deriving a few columns:

<CodeGroup>
```sql SQL icon="database"
CREATE VIEW "discounted_products" AS
SELECT id, name, price, price * 0.9 AS sale_price
FROM "products"
WHERE in_stock = true
```
</CodeGroup>

The statement resolves the view's schema from the query at creation time.
Anything the [SQL dialect](/sql/dql/functions) supports can define one: joins,
predicates, aggregates, window functions -- the same expressiveness as
[a computed column's](/feature-engineering/add-computed-column#expressions)
SQL expression, just over a whole derived table instead of one column.

## Read it like a table {#reading}

<CodeGroup>
```sql SQL icon="database"
SELECT * FROM "discounted_products" WHERE sale_price < 20
```
</CodeGroup>

Every read runs the saved query against current data, so `sale_price`
reflects whatever `price` is right now -- there is no staleness window to
reason about, unlike a materialized view between refreshes. A predicate
applied when reading the view composes with the query inside it, rather than
filtering the view's output afterward, so a selective filter does not pay
for rows the view would have produced and then discarded.

## When to use a view instead {#choosing}

| | View | Computed column / materialized view |
| --- | --- | --- |
| Stores | the query | derived values |
| Freshness | always current | as of the last refresh |
| Read cost | the full query, every read | a column or table scan |
| Write cost | none | a refresh |

Reach for a view when the query is cheap, or when reading a stale value would
be wrong for the workload. Reach for a computed column or a materialized view
when the query is expensive and the data changes less often than it is read.
See [View](/sql/ddl/view#choosing) for the full SQL reference comparison,
including the separate privileges each one needs.

## What to read next {#next}

<CardGroup cols={2}>
  <Card title="View" icon="eye" href="/sql/ddl/view">
    CREATE VIEW, DROP VIEW, and listing views alongside tables.
  </Card>
  <Card title="Create a materialized view" icon="table" href="/feature-engineering/materialized-views">
    The stored-rows counterpart, and when a refresh is worth paying for.
  </Card>
</CardGroup>