Some SQL Tricks of an Application DBA (via) This post taught me so many PostgreSQL tricks that I hadn’t seen before. Did you know you can start a transaction, drop an index, run explain and then rollback the transaction (cancelling the index drop) to see what explain would look like without that index? Among other things I also learned what the “correlation” database statistic does: it’s a measure of how close-to-sorted the values in a specific column are, which helps PostgreSQL decide if it should do an index scan or a bitmap scan when making use of an index.
Recent articles
- Weeknotes: Embeddings, more embeddings and Datasette Cloud - 17th September 2023
- Build an image search engine with llm-clip, chat with models with llm chat - 12th September 2023
- LLM now provides tools for working with embeddings - 4th September 2023
- Datasette 1.0a4 and 1.0a5, plus weeknotes - 30th August 2023
- Making Large Language Models work for you - 27th August 2023
- Datasette Cloud, Datasette 1.0a3, llm-mlc and more - 16th August 2023