Tag: Postgresql

Aborted transactions in Redshift due to Serializable isolation level

~ afish ~ Leave a comment

I was working with seemingly simple load job in Redshift. I was generating some data and wanted to store the output in separate table, just to persist it for debugging purposes. However, since the job could be reran if needed, I wanted to remove rows generated previously and add new ones. So I tried the … Continue reading Aborted transactions in Redshift due to Serializable isolation level

Machine Learning Part 8 — Backpropagation in neural net in SQL

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This is the eighth part of the ML series. For your convenience you can find other parts in the table of contents in Part 1 – Linear regression in MXNet Last time we saw forward propagation in neural net. Today we are going to extend the process to backpropagate the errors. Let’s begin. We need … Continue reading Machine Learning Part 8 — Backpropagation in neural net in SQL