---
id: update
title: "Modify data: update()"
slug: update
custom_edit_url: https://github.com/supabase/supabase/edit/master/web/spec/supabase.yml
---
import Tabs from '@theme/Tabs';
import TabsPanel from '@theme/TabsPanel';
Performs an UPDATE on the table.
```js
const { data, error } = await supabase
.from('cities')
.update({ name: 'Middle Earth' })
.match({ name: 'Auckland' })
```
## Parameters
values
required
Partial
The values to update.
__namedParameters
required
object
No description provided.
Properties
returning
required
minimal | representation
By default the updated record is returned. Set this to 'minimal' if you don't need this value.
count
required
null | exact | planned | estimated
Count algorithm to use to count rows in a table.
## Notes
- `update()` should always be combined with [Filters](/docs/reference/javascript/using-filters) to target the item(s) you wish to update.
## Examples
### Updating your data
```js
const { data, error } = await supabase
.from('cities')
.update({ name: 'Middle Earth' })
.match({ name: 'Auckland' })
```
### Updating JSON data
Postgres offers a
[number of operators](https://www.postgresql.org/docs/current/functions-json.html)
for working with JSON data. Right now it is only possible to update an entire JSON document,
but we are [working on ideas](https://github.com/PostgREST/postgrest/issues/465) for updating individual keys.
```js
const { data, error } = await supabase
.from('users')
.update(`
address: {
street: 'Melrose Place',
postcode: 90210
}
`)
.eq('address->postcode', 90210)
```