引言在数据库的发展历史中，DDL (Data Definition Language) 操作一直是一个重要的挑战。在主流商业数据库的早期版本中，传统的 DDL ...

Featured text from the download: 2. Bring data W. Edwards Deming, the quality guru, once said, “Without data, you’re just another person with an opinion.” This is especially important when ...

For each runner is listed his or her name, age and sex, and broodmare sire. Race data include the race name (when applicable), track, official finish position, distance, and race date. If video of ...