SQL PostgreSQL's missing DateDiff function DATEDIFF is an extremely useful function for analytical queries. Given two timestamps it'll tell you how many days, weeks, months, hours, etc they are apart. Here we show an implementation of this function for Postgres.
SQL Using PostgreSQL as a Data Warehouse With some tweaking Postgres can be a great data warehouse. Here's how to configure it.
SQL Synthetic Data: Generating realistic user timestamps in SQL How to generate timestamps in SQL that match realistic user behavior data.
SQL How to generate a series of numbers in SQL for Redshift, Azure, and Snowflake Generating a sequence of integers in Redshift, Azure, and Snowflake
SQL SQL Hack: How to join tables when the key is buried in a blob of text The SituationText blobs are a pain, but they are commonly used with data from email platforms, Salesforce, or dynamic UTMs. In these cases, the JOIN key is probably hidden in
SQL SQL Hack: How to get first value based on time without a JOIN or a Window Function? This is my favorite trick in SQL! If you are like me and have been working with data for a while, you have googled “how to get the first value
