Simplifying Complex Column Queries Using Common Table Expressions

Counting Occurrences with Exclude Criteria Using Window Functions and Aggregation in SQL

Handling Non-Unique Columns: A Deep Dive into Select and Count Attribute

Preventing Data Insertion with Oracle Triggers: A Practical Guide to Enforcing Business Rules.

Working with Dates and Times in Postgres for Ongoing Analysis

Finding Missing Values in Alphanumeric Sequences: A SQL and MySQL Solution

Formatting Week Start Dates with Leading Zeros in SQL Queries

Converting XML with Multi-Item Sequence into Columns and Rows: A SQLDEVELOPER Guide

How to Overcome Duplicate Records in Redshift Databases Using Window Functions and Join Logic

Extracting Specific Substrings from IDs in BigQuery Using SUBSTR Function