本书是一本指南,其中包含了一系列SQL 的常用问题以及它们的解决方案,希望能对读者的日常工作有所帮助。本书将相关主题的小节归成章,如果读者遇到不能解决的SQL 新问题,可以先找到最可能适用的章,浏览其中各小节的标题,希望读者能从中找到解决方案,至少可以找到点灵感。-This book is a guide, which contains a series of common SQL problems and their solutions, hoping to help the reader of the daily work. This book will go Chengzhang related topics section, if the reader can not solve the SQL encounter new problems, you can find the most likely for the first chapter, visit one of the subsections of the title, from the hope that readers find the solution, at least for inspiration can be found .