---
title: Write to PostgreSQL
description: Use sql.to() with the postgres driver to write data to PostgreSQL.
url: https://docs.influxdata.com/flux/v0/write-data/sql/postgresql/
estimated_tokens: 869
product: Flux
version: v0
---

# Write to PostgreSQL

To write data to [PostgreSQL](https://www.postgresql.org/) with Flux:

1. Import the [`sql` package](/flux/v0/stdlib/sql/).
    
2. Pipe-forward data into [`sql.to()`](/flux/v0/stdlib/sql/to/) and provide the following parameters:
    
    -   **driverName**: postgres
    -   **dataSourceName**: *See [data source name](#postgresql-data-source-name)*
    -   **table**: Table to write to
    -   **batchSize**: Number of parameters or columns that can be queued within each call to `Exec` (default is `10000`)

```js
import "sql"
  
data
    |> sql.to(
        driverName: "postgres",
        dataSourceName: "postgresql://username:password@localhost:5432",
        table: "example_table",
    )
```

## PostgreSQL data source name

The `postgres` driver uses the following DSN syntax (also known as a **connection string**):

```
postgres://username:password@localhost:5432/dbname?param=value
```

## Flux to PostgreSQL data type conversion

`sql.to()` converts Flux data types to PostgreSQL data types.

| Flux data type | PostgreSQL data type |
| --- | --- |
| float | FLOAT |
| int | BIGINT |
| uint | BIGINT |
| string | TEXT |
| bool | BOOL |
| time | TIMESTAMP |

#### Related

-   [sql.to() function](/flux/v0/stdlib/sql/to/)