Query SQL databases

Use sql.from() to query SQL databases with Flux.

• Databases
• Drivers
• Data source names
  • Store sensitive credentials as secrets
• Results structure
  • Column data types

Databases

sql.from() supports the following SQL databases:

Drivers

sql.from() uses Go SQL drivers in the Go sql package to connect to SQL databases. The following drivers are available:

• awsathena
• bigquery
• hdb
• mysql
• postgres
• snowflake
• sqlite3
• sqlserver
• vertica, vertigo

Data source names

Each SQL driver supports unique data source name (DSN) syntaxes (also known as connection strings). See the database guides for information about DSNs for each driver.

Store sensitive credentials as secrets

If using InfluxDB Cloud or InfluxDB OSS 2.x, we recommend storing DSN credentials as InfluxDB secrets. Use secrets.get() to retrieve a secret from the InfluxDB secrets API.

import "sql"
import "influxdata/influxdb/secrets"

username = secrets.get(key: "POSTGRES_USER")
password = secrets.get(key: "POSTGRES_PASS")

sql.from(
    driverName: "postgres",
    dataSourceName: "postgresql://${username}:${password}@localhost:5432",
    query: "SELECT * FROM example_table",
)

Results structure

sql.from() returns a stream of tables with no grouping (all rows in a single table). For more information about table grouping, see Flux data model - Restructure tables.

Given the following example_table in a MySQL database:

example_table

Flux query

import "sql"

sql.from(
    driverName: "mysql",
    dataSourceName: "username:passwOrd@tcp(localhost:3306)/db",
    query: "SELECT ID, Name FROM example_table",
)

Output