---
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: 449
product: Flux
version: v0
publisher: InfluxData
canonical: https://docs.influxdata.com/flux/v0/write-data/sql/postgresql/
date: '2023-09-12T23:33:31-06:00'
lastmod: '2023-09-12T23:33:31-06:00'
---

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`)

```
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](/flux/v0/data-types/basic/float/) |       FLOAT        |
|   [int](/flux/v0/data-types/basic/int/)   |       BIGINT       |
|  [uint](/flux/v0/data-types/basic/uint/)  |       BIGINT       |
|[string](/flux/v0/data-types/basic/string/)|        TEXT        |
|  [bool](/flux/v0/data-types/basic/bool/)  |        BOOL        |
|  [time](/flux/v0/data-types/basic/time/)  |     TIMESTAMP      |

#### Related

* [sql.to() function](/flux/v0/stdlib/sql/to/)
| Flux data type | PostgreSQL data type |
| --- | --- |
| Flux data type | PostgreSQL data type |
| float | FLOAT |
| int | BIGINT |
| uint | BIGINT |
| string | TEXT |
| bool | BOOL |
| time | TIMESTAMP |