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《数据库系统概念 Database System Concepts》原书教学资源(第七版,PPT课件讲稿,英文版)Chapter 3 Introduction to SQL

▪ Overview of The SQL Query Language ▪ SQL Data Definition ▪ Basic Query Structure of SQL Queries ▪ Additional Basic Operations ▪ Set Operations ▪ Null Values ▪ Aggregate Functions ▪ Nested Subqueries ▪ Modification of the Database
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