Unlocking the Power of Snowflake: Mastering the FILTER Function for Efficient Data Analysis

Selecting Random Rows from Tables with One-to-Many Relationships Using Joins

Merging Two Tables to Find Total Number of Books Sold for Each Day

Enforcing Uniqueness Across Multiple Columns in Postgres: A Bridge Table Approach

Iterating Through Customers on a 12-Months-Rolling Basis: Two Approaches to Simplify Your Queries

Finding Distinct Values for Each Row in a Table Using UNION Operator

Converting Data Wide to Long with Sequential Dates Using Outer Apply in Oracle 12c and Later Versions

Understanding Time Zones and UTC: A Guide to Converting UTC Times to Local Times in PostgreSQL

Understanding HAVING and Aliases in PostgreSQL for Efficient Query Writing

Finding Maximum and Minimum Values in a Set Order by Time with PostgreSQL