I’m using Grafana with PostgreSQL as a data source. I’ve created a custom variable custom_sql that I use in my panels, for example, a bar chart, where I define it as: ${custom_sql}. This setup allows me to use a Telegram bot that accepts custom SQL queries as requests and returns a rendered graph in response.

I’m using Grafana with PostgreSQL as a data source. I’ve created a custom variable custom_sql that I use in my panels, for example, a bar chart, where I define it as: ${custom_sql}. This setup allows me to use a Telegram bot that accepts custom SQL queries as requests and returns a rendered graph in response.

I’m using Grafana with PostgreSQL as a data source. I’ve created a custom variable custom_sql that I use in my panels, for example, a bar chart, where I define it as: ${custom_sql}. This setup allows me to use a Telegram bot that accepts custom SQL queries as requests and returns a rendered graph in response.

I’m using Grafana with PostgreSQL as a data source. I’ve created a custom variable custom_sql that I use in my panels, for example, a bar chart, where I define it as: ${custom_sql}. This setup allows me to use a Telegram bot that accepts custom SQL queries as requests and returns a rendered graph in response.

I’m using Grafana with PostgreSQL as a data source. I’ve created a custom variable custom_sql that I use in my panels, for example, a bar chart, where I define it as: ${custom_sql}. This setup allows me to use a Telegram bot that accepts custom SQL queries as requests and returns a rendered graph in response.

I’m using Grafana with PostgreSQL as a data source. I’ve created a custom variable custom_sql that I use in my panels, for example, a bar chart, where I define it as: ${custom_sql}. This setup allows me to use a Telegram bot that accepts custom SQL queries as requests and returns a rendered graph in response.

Good afternoon, I have a table in a PostgreSQL database that has a set of data written to it at different intervals.

I have a table “Data” containing the columns “DateTimeUTC” and “A”, where I want to calculate the difference in A over a certain time range and display this difference in a time series in Grafana.