kraken | High performance WebRTC SFU implemented with pure Go

I have an SQL-Table which is build like a tree list (parent child). Means you have rootId's and childId's. Each entity has a ParentId. If the ParentId is null then that element is a root item.

Here an example of the hierarchical architecture

I am not great with tidyverse so forgive me if this is a simple question. I have a bunch of files with data that I need to extract and add into distinct columns in a tibble I created.

I want the the row names to start with the file IDs which I did manage to create:

I am having an issue with getting the correct headers in my pandas dataframes. Below is my full code. I would like to strip all the headers and then add my own at the very end.

So when loading kraken.com historical datafeed into pandas to convert from tick data (time and sales) to OHLC (Open,High,Low,Close) data I run into an issue where I am not able to resample for 'high' & 'low' as they throw errors, but 'first', 'last', and 'sum' work just fine, I don't know why or what the available options are as it seems there is an enumerated list of options (total guess there).

The code below takes heavy inspiration (out right copping blindly) from ryantjo's Resampling Market Tick Data.

I have a large table with a comments column (contains large strings of text) and a date column on which the comment was posted. I created a separate vector of keywords (we'll call this key) and I want to count how many matches there are for each day. This gets me close, however it counts matches across the entire dataset, where I need it broken down by each day. The code:

I have a simple cryptocurrency app that uses an API to fetch prices. I am using Firestore to store my API key and my app retrieves my API key from Firestore when launched. My API key is the only data I have in my Firestore. Since my app doesn't allow users to create profiles/accounts, I don't include user authentication in my rules. My security rules for Firestore are:

I have two tables with >4million records i need to make a select query with where two columns match bring both tables value on this match and then i will insert that into a 3rth table:

This is table A: (bitfinex)

This is table B: (Kraken)

I need to do a SELECT where timestamp and exchange_pair matches, as you can see in this image from table B the same timestamp can have multiple exchange_pair, what i need to do is match those with the other table columns and bring both table content

this was the query i used at once but when analyzing the results i had some mismatch values on the joins ( i did not found the relation, it was not either timestamp or the exchange pair) i wonder if my query syntax is right for the result im looking for.

I am getting an exception: "Object reference not set to an instance of an object". I can't understand, why. What's wrong with my connections between tables? I wanted to establish a relationship between the "Country" and "Company" tables in a one-to-many relationship, to avoid duplicating countries in the Company table ( This is what the table looked like before - Image3. I want to create 3 table.

Information about exception: Image1

Information2: Image2

The table before: Image3

An exception occurs in the tables: "Product" - "Company" - "Country". Seed Database:

In the table "Categories" the data is displayed normally. But I can't get data in tables: "SubCategories" and "Products". The values in the columns are == null. Foreign keys between tables appear when viewed by the designer. Previously, there were no such problems, but suddenly a problem appeared with using asynchrony.

1. Image1 2) Image2 Logger1: Logger Logger2: Logger