Querier is a library for querying relational databases in Pharo. It focuses on simplicity and is inspired by NotORM. Querier allows accessing database tables as collections of rows represented as dictionaries. It supports common queries like filtering rows by conditions, sorting, limiting results, aggregations, and accessing related data. Methods are provided for selecting, updating, deleting and inserting rows into tables. The current implementation works with Postgres but the goal is to support other databases through the Garage abstraction layer.