---
id: subscribe
title: "on().subscribe()"
slug: subscribe
---
import Tabs from '@theme/Tabs';
import TabItem from '@theme/TabItem';
Subscribe to realtime changes in your databse.
```js
const mySubscription = supabase
.from('*')
.on('*', payload => {
console.log('Change received!', payload)
})
.subscribe()
```
```py
# Not yet implemented
```
## Parameters
event
required
INSERT | UPDATE | DELETE | *
The database event which you would like to receive updates for, or you can use the special wildcard `*` to listen to all changes.
callback
required
object
A callback that will handle the payload that is sent whenever your database changes.
## Notes
- If you want to receive the "previous" data for updates and deletes, you will need to set `REPLICA IDENTITY` to `FULL`, like this: `ALTER TABLE your_table REPLICA IDENTITY FULL;`
## Examples
### Listen to all database changes
```js
const mySubscription = supabase
.from('*')
.on('*', payload => {
console.log('Change received!', payload)
})
.subscribe()
```
```py
# Not yet implemented
```
### Listening to a specific table
```js
const mySubscription = supabase
.from('countries')
.on('*', payload => {
console.log('Change received!', payload)
})
.subscribe()
```
```py
# Not yet implemented
```
### Listening to inserts
```js
const mySubscription = supabase
.from('countries')
.on('INSERT', payload => {
console.log('Change received!', payload)
})
.subscribe()
```
```py
# Not yet implemented
```
### Listening to updates
```js
const mySubscription = supabase
.from('countries')
.on('UPDATE', payload => {
console.log('Change received!', payload)
})
.subscribe()
```
```py
# Not yet implemented
```
### Listening to deletes
```js
const mySubscription = supabase
.from('countries')
.on('DELETE', payload => {
console.log('Change received!', payload)
})
.subscribe()
```
```py
# Not yet implemented
```
### Listening to multiple events
You can chain listeners if you want to listen to multiple events for each table.
```js
const mySubscription = supabase
.from('countries')
.on('INSERT', handleRecordInserted)
.on('DELETE', handleRecordDeleted)
.subscribe()
```
```py
# Not yet implemented
```
### Listening to row level changes
You can listen to individual rows using the format `{table}:{col}=eq.{val}` - where `{col}` is the column name, and `{val}` is the value which you want to match.
```js
const mySubscription = supabase
.from('countries:id=eq.200')
.on('UPDATE', handleRecordUpdated)
.subscribe()
```
```py
# Not yet implemented
```