HackerRank isn’t just a random collection of problems; they’ve organized their SQL section pretty well. You can find ...

Microsoft ORM Mapper learns column types Vector and JSON in Microsoft SQL Server 2025. At the same time, there is a first ...

The 'New SQL Requirement' function of Feisuan JavaAI, based on powerful natural language processing and SQL syntax parsing ...

全表扫描（Full Table Scan）是数据库查询中常见的性能杀手，尤其在数据量巨大的生产环境中，一条效率低下的 SQL 就足以引发连锁性的系统故障。为从根本上防范此类风险， 百度 智能云数据库在 MySQL ...

There are significant differences in the implementation logic, character set support, and usage details of VARCHAR among various databases, with SQL Server and PostgreSQL being particularly ...

These books cover everything from beginner SQL queries to advanced database architecture. Perfect for developers, data analysts, and backend engineers. Learn performance tuning, indexing, ...

DBeaver is a free, open-source, cross-platform SQL client and database administration tool. It is designed to support a wide variety of SQL and NoSQL databases, including MySQL and PostgreSQL. Its key ...

SELECT COUNT(*) FROM v0 WHERE (CURRENT_DATE, c0) != (CAST(NULL AS TEXT), '0'); SELECT SUM(CASE WHEN (CURRENT_DATE, c0) != (CAST(NULL AS TEXT), '0') THEN 1 ELSE 0 END) FROM v0; The two SQL queries have ...