SQL NULL Pitfalls: Why NOT IN Returns Zero Results and 3 Points Where MySQL and Oracle Behaviors Diverge

Introduction"I want to list customers who haven't ordered, but I get zero results," or "The count doesn't match when I ...

[Database Edition 08] Understand SQL Execution Plans! Essential Knowledge for Finding the Cause of Slow SQL

The theme for this time is SQL "execution plans."Execution plans are one of the technologies you absolutely must understand when considering database performance.However, this content might also be a ...
blog.csdn

SQL SELECT INTO 语法全解析：跨数据库差异、实战应用与避坑指南

本文将为你彻底拆解 SELECT...INTO 语法。无论你是刚刚接触SQL的新手，还是希望梳理知识体系的中级开发者，都能从这里获得清晰的指引和实用的技巧。我们会从最基本的语法结构讲起，深入到不同数据库（如SQL Server, MySQL, PostgreSQL）中的实现差异和注意事项，最后分享在真实项目中如何用好它来规避 ...
thecode

SQL-запросы это не страшно! Вся база с примерами

Если вы хотите работать аналитиком, тестировщиком или разработчиком, SQL — это то, о чём вас обязательно спросят на собеседовании. По данным ...
tproger

SQL: полный путеводитель — от первых запросов до оконных функций

SQL (Structured Query Language) — язык запросов для работы с реляционными базами данных, который появился больше 50 лет назад и остаётся одним из самых ...
habr

SQL за одну статью: от «SELECT *» до оконных функций и сложных JOIN-ов

1. Введение: Почему SQL всё еще «база»? Кажется, что в ИТ всё меняется каждые пару лет. Фреймворки рождаются и умирают, архитектурные подходы ...
Microsoft

From code to community: The collective effort behind SQL Server 2025

At Build 2025, SQL Server 2025 officially entered public preview. As one of the world’s most popular databases, this release continues a decades-long history of innovation with features made for ...
The Hill

House COVID-19 panel releases final report: 3 key takeaways

The House Select Subcommittee on the Coronavirus Pandemic released its final report Monday, laying out numerous conclusions from its review of the federal pandemic response, including what the ...
Forbes

Select Medical To Spin-Off Concentra On November 25th

a) Record Date: The record date for the spin-off is November 18, 2024. b) Split Ratio: Shareholders will receive approximately 0.806971 shares of Concentra’s common stock for each share of Select ...
Visual Studio Magazine

Microsoft Previews Copilot AI in SQL Server Management Studio

In announcing SQL Server Management Studio (SSMS) 21 Preview 1 this week, Microsoft revealed Copilot AI for the tool is also being previewed, privately. A Copilot for the tool that helps users manage, ...
Hacker

SQL vs T-SQL: Key Differences and Use Cases

A Technical Project Manager with expertise in agile methodologies, project planning, quality assurance, and more. SQL (Structured Query Language) is the universal language for managing and interacting ...