Handling Joins on Multiple Tables with Null Values in Hive Using Built-in Functions and User-Defined UDFs

Comparing Data Between Two Tables in Oracle SQL Using LTRIM Function to Remove Prefixes

Understanding and Generating Hierarchical Tables in Oracle: A Modular SQL Script Approach

Optimizing Data Selection: Two Solutions for Efficient Table Joins Without COALESCE, INTERSECT, or EXCEPT

Selecting a Single Row Per Unique ID: A Comprehensive Approach for IBM Netezza and Aginity Workbench

Implementing Date Constraints with Triggers and Checks in PostgreSQL

Capturing Previous Period End Date Logic in SQL with Amazon Redshift: A Comprehensive Approach

MySQL's Implicit Casting Rules: The Equal (=) Operator's Surprising Behavior

Handling Date and Time Conversion Errors in SQL Server

Joining Two Tables and Getting the Most Recent Records for a Given Name: A SQL Solution Using Correlated Subqueries