---
title: "Update"
sidebarTitle: "Update"
description: "UPDATE ... SET ... WHERE — and why it does not recompute derived columns."
icon: pen
keywords: ["update", "sql"]
---

<Badge color="red">Enterprise</Badge> [SQL runs on a deployment.](/sql)

```sql
UPDATE documents SET title = upper(title) WHERE category = 'film'
```

Assignments take any expression the [dialect](/sql/functions) supports,
including references to other columns of the same row. Without a `WHERE`
clause every row is updated.

<Warning>
An update does not recompute [computed columns](/feature-engineering/add-computed-column)
that derive from the column you changed. A filled value keeps what it was
computed from -- see [Guarantees](/basics/guarantees#jobs).
</Warning>

Commits a new table version, so [versioning](/management/table#versioning) and
the [write guarantees](/basics/guarantees#writes) apply -- including that the
version advances even when the statement affects zero rows.

## What to read next {#next}

<Card title="Update" icon="pen" href="/ingestion/update">
  The SDK equivalent.
</Card>