After doing these courses, I feel confident creating professional visualizations and dashboards
Shoebur RahmanProcurement Specialist, Giz Bangladesh
Course Description
Did you know that data scientists and data analysts spend a large amount of time cleaning data before they can analyze it? This is because real-world data is messy. To help you navigate messy data this course teaches you how to clean data stored in an SQL Server database. You’ll learn how to solve common problems such as how to clean messy strings, deal with empty values, compare the similarity between strings, and much more. You’ll get hands-on with all these tasks using a wide range of interesting and messy datasets, including monthly airline flights by airport, TV series and paper shop sales. Are you ready to get your hands messy?
Prerequisites
Curriculum
Course outline
1
Starting with Cleaning Data
To begin the course, you will learn why cleaning data is important. You will solve simple problems such as leading and trailing spaces in strings, unifying formats for flight registrations, combining strings and more.
- Introduction to Cleaning Data50 XP
- Unifying flight formats I100 XP
- Unifying flight formats II100 XP
- Cleaning messy strings50 XP
- Trimming strings I100 XP
- Trimming strings II100 XP
- Unifying strings100 XP
- Comparing the similarity between strings50 XP
- SOUNDEX() and DIFFERENCE()50 XP
- Comparing names with SOUNDEX()100 XP
- Comparing names with DIFFERENCE()100 XP
2
Dealing with missing data, duplicate data, and different date formats
In this chapter, you will deepen your data cleaning knowledge. You will learn how to deal with missing data, avoid duplicate data in your datasets, and work with different formats of dates.
3
Dealing with out of range values, different data types, and pattern matching
In this chapter, you will deal with out of range values and inaccurate data. You will also practice converting data with different types. Finally, you will work on matching patterns to your data to find outliers.
4
Combining, splitting, and transforming data
In this final chapter, you will learn how to combine and aggregate data of some columns into one, split data of one column into more columns, and transform rows into columns and vice versa.
S
Cleaning Data in SQL Server Databases
Course
Complete
