Here is how to change column from NULL to NOT NULL in SQL Server, MySQL, PostgreSQL using ALTER TABLE statement.
Redshift
How to Calculate Running Total in Redshift
Cumulative Total allows you to track running totals over time. Here’s how to calculate running total in Redshift.
How to Calculate Moving Average in Redshift
Rolling Average helps smoothen numerical trends in data. Here’s how to calculate moving average in Redshift using SQL query.
