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所在平台: Udemy |
课程主页: https://www.udemy.com/course/sql-for-beginner-for-data-analytics-business-intelligence/
课程评论：没有评论
课程名称：SQL基础—数据分析与商业智能 课程概述： 该课程为学生提供了数据库的基础知识，包括其目的及在各种应用中的使用。学生将学习数据库管理系统（DBMS）及不同类型的数据库，例如关系数据库。 课程内容： 1. **数据库概念**：学生将掌握数据库的基本概念及其应用。 2. **SQL基础**：学习SQL的基本语法、数据类型、操作符和函数，能够创建、修改和删除数据库对象如表、视图、索引和约束。 3. **数据查询**：学生将掌握如何使用SQL查询从数据库中提取数据，包括使用SELECT语句及其各种子句（如WHERE、GROUP BY、HAVING、ORDER BY和JOIN）进行数据筛选和聚合。 4. **数据操作**：学习如何使用SQL语句插入、更新和删除数据，掌握表的结构和内容的修改技巧。 5. **数据筛选与排序**：掌握基于特定条件的数据过滤和排序技能，使用比较操作符、逻辑操作符和通配符来精炼查询。 6. **数据分析**：使用SQL进行基本数据分析，学会利用聚合函数（如SUM、AVG、COUNT）和分组计算汇总统计以及生成报告。 7. **数据连接**：学习如何使用不同类型的连接（如内连接、左连接、右连接和全连接）将多个表中的数据结合，理解如何利用主键和外键建立表之间的关系。 8. **子查询与视图**：探索高级SQL概念，如子查询和视图，学习如何创建嵌套查询以从多个层次检索数据，并创建虚拟表以简化复杂查询与提高查询重用性。 9. **数据完整性与约束**：了解在数据库中维护数据完整性的重要性，学习主键、外键、唯一约束和检查约束等约束条件，以确保数据的一致性与完整性。 通过这门课程，学生将掌握SQL的基本技能，为数据分析和商业智能领域的进一步学习奠定坚实的基础。
Introduction to Databases: Students will gain a foundational understanding of databases, their purpose, and how they are used in various applications. They will learn about database management systems (DBMS) and different types of databases, such as relational databases.SQL Fundamentals: Students will learn the basics of SQL, including the syntax, data types, operators, and functions. They will understand how to create, modify, and delete database objects such as tables, views, indexes, and constraints.Querying Data: Students will learn how to retrieve data from a database using SQL queries. They will understand the SELECT statement and its various clauses, such as WHERE, GROUP BY, HAVING, ORDER BY, and JOIN. They will be able to filter, sort, and aggregate data to extract the required information.Data Manipulation: Students will learn how to insert, update, and delete data in a database using SQL statements. They will understand how to modify the structure and content of tables, including adding or removing columns and altering data.Data Filtering and Sorting: Students will gain skills in filtering and sorting data based on specific conditions. They will learn how to use comparison operators, logical operators, and wildcard characters to refine their queries.Data Analysis: Students will learn how to perform basic data analysis using SQL. They will understand how to use aggregate functions (such as SUM, AVG, COUNT) and grouping to calculate summary statistics and generate reports.Data Joins: Students will learn how to combine data from multiple tables using different types of joins, such as inner join, left join, right join, and full outer join. They will understand how to establish relationships between tables using primary and foreign keys.Subqueries and Views: Students will explore advanced SQL concepts like subqueries and views. They will learn how to create nested queries to retrieve data from multiple levels and how to create virtual tables (views) for simplifying complex queries and improving query reusability.Data Integrity and Constraints: Students will understand the importance of maintaining data integrity in a database. They will learn about constraints, such as primary keys, foreign keys, unique constraints, and check constraints, to enforce data consistency and integrity.
