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所在平台: Udemy |
课程主页: https://www.udemy.com/course/27-practical-sql-queries-to-solve-business-problems/
课程评论：没有评论
课程名称：解决商业问题的27个实用SQL查询 课程概述：提升技能的最佳方式是通过实践。本课程强调动手实践，帮助学员掌握SQL（结构化查询语言），这是IT行业中最受欢迎和需求量大的技能之一。随着大数据和依赖数据的业务应用（从社交媒体到地方银行）的发展，SQL技能显得尤为重要。本课程专为初学者设计，以帮助他们逐步了解SQL。课程开始时，将指导学员如何搭建实验环境，包括下载和安装Microsoft SQL Server及示例数据库Northwind。 在课程中，我们将解决27个与商业相关的问题，通过构建SQL查询来查询数据库并得出解决方案。具体内容包括： - 使用SELECT检索数据 - 使用别名 - 使用CASE表达式 - 消除重复数据 - 使用等值过滤器过滤数据 - 进行基本比较、字符串比较、逻辑比较和NULL比较 - 使用ORDER BY子句对数据进行升序和降序排序 - 使用表连接从多个表中提取数据 - 使用UNION运算符合并两个或多个SELECT语句的结果 - 使用聚合函数计算单个输出值 - 使用GROUP BY子句对相关数据进行分组 通过这门课程，学员将掌握足够的技能来有效地查询数据库，解决各类商业问题。
The best way to build up your skills in any area is by practice. This course is a hands-on practical learn by doing course. SQL ( SQL -Structural Query language ) is one of the most popular and sort after skills in the IT industry. SQL Skills is so important especially with big data and data dependent businesses and applications from Facebook to our local banks. This course was designed with the beginner in mind. The course starts by walking you through how to setup a lab where you will download and install Microsoft SQL Server and the sample Northwind database. In this course we will solve 27 business related problem questions by building SQL queries to interrogate the database and produce the answers to solving the business problems. We will use the following while building our queries to solve the business problems:Retrieve data with SELECT Use Aliases Use Case Expressions Eliminate duplicatesFilter data with equality filters Filter data with basic comparisons Filter data with string comparisons Filter data with logical comparisons Filter data with NULL comparisons Use order by clauseSort data by ascending and descending order Use Table joins to extract data from multiple tablesUse UNION operator to combine results of two or more SELECT Statements Aggregate functions to compute a single output valueGROUP BY Clause to group related data By the end of this course you will be would have gained enough skills to interrogate Database.
