This is a comprehensive guide to `.xql` files, covering their syntax, best practices, and real-world applications.

Optimizing Image Storage and Retrieval from SQL Databases for High Performance

Calculating Min and Max Values for a Column Grouped by Unique ID Using Window Functions in SQL

Handling Null Values and Multiple Columns in SQL Server: Unpivot vs. Cross Apply for Better Data Transformation

Creating a BEFORE INSERT Trigger with Primary Key Using the sqlite3 Shell .import Command: A Comprehensive Guide to Handling Duplicate Primary Keys

Retrieving Count of Rows Between Two Dates Using SQLite3 Query in Python

Selecting Multiple Cells from a Table Using SQL Aggregation and Pivoting Techniques

The Idiomatic Way to Make SQL Server's Insert Statement Idempotent Using NOT EXISTS

Understanding SQL Server Graphical Execution Plans: A Deep Dive into the Decimal Number Below the Cost Percentage

Optimizing MySQL Queries: How to Select Records from Multiple Tables with Limited Results