Using SQL String Functions to Clean Data

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提供方
在此指导项目中,您将:

Understand how string functions work and when to use them

Clean data using different string functions

Manipulate data using SQL SELECT statements together with string functions

2 hours
中级
无需下载
分屏视频
英语(English)
仅限桌面

Welcome to this project-based course on Using SQL String Functions to Clean Data. In this project, you will learn how to perform data cleaning and manipulation using SQL string functions like LENGTH, UPPER & LOWER, REPLACE, TRIM, SUBSTRING, CONCAT, STRING_AGG, and COALESCE. By the end of this 2-hour long project, you will understand why you need to learn about string functions and use them to get the desired result you want from tables in a database. Also, for this hands-on project, we will use PostgreSQL as our preferred database management system (DBMS). Therefore, to complete this project, it is required that you have prior experience with using PostgreSQL. Similarly, this project is an advanced SQL concept; so, a good foundation for writing SQL queries is vital to complete 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.” I taught these guided projects using PostgreSQL. Taking these projects will give the needed requisite to complete this project Using SQL String Functions to Clean Data. However, if you are comfortable writing queries in PostgreSQL, please join me on this wonderful ride! Let’s get our hands dirty!

您要培养的技能

  • Data Manipulation

  • Data Cleansing

  • String Functions

  • Postgresql

  • SQL

分步进行学习

在与您的工作区一起在分屏中播放的视频中,您的授课教师将指导您完成每个步骤:

  1. Retrieve data from tables in the employees database

  2. Use the LENGTH, LEFT, RIGHT functions to retrieve data

  3. Use the UPPER & LOWER functions to clean data

  4. Use the REPLACE function to manipulate data

  5. Use the TRIM, RTRIM, LTRIM functions to clean data

  6. Use the concatenate functions to manipulate data

  7. Use the SUBSTRING function to retrieve data

  8. Use the STRING_AGG function to retrieve and manipulate data

  9. Use the COALESCE function to retrieve and manipulate data

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