Performing Data Aggregation using SQL Aggregate Functions

4.8
별점
55개의 평가
제공자:
Coursera Project Network
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Retrieve data as summaries from tables of a database using SQL aggregate functions

Understand how to set conditions on the result set of an aggregate functions using the HAVING clause

Clock2 hours
Intermediate중급
Cloud다운로드 필요 없음
Video분할 화면 동영상
Comment Dots영어
Laptop데스크톱 전용

In this 2-hour long project-based course, you will learn how to retrieve data from tables in a database using SQL SELECT statement with SQL Aggregate functions. The aggregate functions we will consider in this project are COUNT, SUM, MIN, MAX and AVG. Aggregate functions are used to summarize data from rows of a table into a single value. In addition, you will learn how to set conditions on the output of an aggregate function using the HAVING clause. Finally, you will learn how to tidy up the result set of aggregate functions using the ROUND function. Note: You do not need to be a data administrator or data analyst to be successful in this guided project, just a familiarity with querying databases using SQL SELECT statement suffice for this project. If you are not familiar with SQL and want to learn the basics, start with my previous guided projects titled “Performing Data definition and Manipulation in SQL." and “Querying Databases using SQL SELECT statement”

개발할 기술

  • Data Management
  • Data Manipulation
  • Relational Database
  • Postgresql
  • Data Aggregation

단계별 학습

작업 영역이 있는 분할 화면으로 재생되는 동영상에서 강사는 다음을 단계별로 안내합니다.

  1. Retrieve data from the employees database

  2. Retrieve data from the employees database using the COUNT function

  3. Select distinct data from fields of a table and use the GROUP BY statement

  4. Use the HAVING clause to set conditions on aggregate functions

  5. Retrieve data from the employees database using the SUM function

  6. Retrieve data from the employees database using the MIN & MAX functions

  7. Retrieve data from the employees database using the AVG function

  8. Use ROUND to tidy up the result set of aggregate functions

안내형 프로젝트 진행 방식

작업 영역은 브라우저에 바로 로드되는 클라우드 데스크톱으로, 다운로드할 필요가 없습니다.

분할 화면 동영상에서 강사가 프로젝트를 단계별로 안내해 줍니다.

검토

PERFORMING DATA AGGREGATION USING SQL AGGREGATE FUNCTIONS의 최상위 리뷰

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