Latest posts from Greg Sabino Mullane
How to Solve Advent of Code 2022 Using Postgres - Day 9
Day 9 of AOC we have new hands on SQL for looking at a rope bridge. This one uses a custom function and colored ASCII art.
11 min readHow to Solve Advent of Code 2022 Using Postgres - Day 8
Day 8 of AOC we have new hands on SQL for reviewing treetop views. This one uses includes PL/pgSQL, row_number window functions, sequences, and regexp_split_to_table.
8 min readHow to Solve Advent of Code 2022 Using Postgres - Day 7
Day 7 of AOC we have new hands on SQL for reviewing terminal commands. This one uses recursive queries, text arrays and so many functions. Bonus, there are functions for regexp_count, regexp_replace, and regexp_substr which are new in Postgres 15.
13 min readHow to Solve Advent of Code 2022 Using Postgres - Day 6
Day 6 of AOC we have new hands on SQL detecting markers in datastreams. This one uses regexp_split_to_table, strpos, lag() functions and COUNT(DISTINCT). Also, a great example of using a DO function with RAISE NOTICE.
5 min readHow to Solve Advent of Code 2022 Using Postgres - Day 5
Day 5 of AOC we have new hands on SQL for helping stack crates. There are some cool PL/pgSQL for moving things around. Plus generate_series(), upsert ON CONFLICT, and backwards sequencing.
13 min readHow to Solve Advent of Code 2022 Using Postgres - Day 4
Day 4 of AOC we have new hands on SQL for helping the Elves cleaning up camp. Postgres solutions include the function split_part(), the int4range data type, and range operators.
5 min readHow to Solve Advent of Code 2022 Using Postgres - Day 3
Day 3 of AOC we have lots of great SQL for organizing a rucksack. Postgres solutions for this one include functions for length(), left(), right(), regexp_replace(), COLLATE commands, window function lag(), and more.
7 min readHow to Solve Advent of Code 2022 Using Postgres - Day 2
Day 2 of AOC we have sql for transforming raw data into game analysis of paper, rock, scissors. Included is a nice custom function and great examples for IF/ELSE, CTEs, and more.
10 min readHow to Solve Advent of Code 2022 Using Postgres - Day 1
Greg is doing the Advent of Code using PostgreSQL and he is going to share a few of his tricks. Day 1 he uses file_fdw to connect to the text file provided. Along with a couple grouping and sum queries, he has a quick solution for you.
4 min readSecure Permissions for pgBackRest
A guide on securing the pgBackRest user for high-security Postgres environments.
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Fun with pg_checksums
Data checksums are a great feature in PostgreSQL. They are used to detect any corruption of the data that Postgres stores on disk. Every system we develop at Crunchy Data has this feature enabled by default. It's not only Postgres itself that can make use of these checksums.
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