Some useful bits and pieces I've come across for using SQL, mostly the Teradata variant.
How to calculate a person's age correctly given a date and their date of birth in Teradata SQL.
Some useful SQL that lets you find how much disk space your database and tables are actually using.
Useful SQL to create a reference table of human generations like Millennial, Generation X, Baby Boomer etc with start and end dates.
This SQL lets you find all the tables in a particular database or your user area (your personal database) in Teradata, or table names that match a pattern.
How to compare two timestamps in SQL and express the result in hours.
How to find the number of AMPs and Nodes in a Teradata installation using a simple SQL query.
This SQL creates a series of commands that can be used to DROP (aka delete) all the TABLES that match a pattern or username.
Explains how to use SQL to check if a table already exists. Very useful to check prior to dropping a table, or for volatile tables if you re-run SQL.
This one came about because a set of data I was dealing with had UK postcodes in it. The data came in from a whole variety of sources, and a
