Understanding Data Cleaning | Google Data Analytics Certificate

Рет қаралды 175,117

Күн бұрын

Data cleaning is essential for successful analysis. If a piece of data is entered into a spreadsheet or database incorrectly, or if data formats are inconsistent, the result is dirty data. Let's go through why and how to clean data.
0:00 Getting Started with Data Cleansing
3:20 Why Data Cleaning is Important
9:05 Identify Dirty Data
14:31 Starting the Data Cleansing Process
20:51 Cleaning Data from Multiple Sources
26:37 Data Cleaning Features
34:43 Optimize the Data Cleaning Process
48:50 Data Perspectives
59:12 Even More Data Cleaning Techniques
This video is part of the Google Data Analytics Certificate which teaches learners how to prepare, process, analyze, share, and act on data.
The program, created by Google employees in the field, is designed to provide you with job-ready skills in about 6 months to start or advance your career in data analytics.
Take the Certificate HERE: goo.gle/3YZJx1Z
Subscribe HERE: bit.ly/SubscribeGCC
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Пікірлер: 66

@inhlam5909 2 жыл бұрын

* Starting the data cleansing process: 18:57 * Cleaning Data from multiple sources: 25:16, 25:48 * Data cleaning features: Conditional format rules, Remove duplicates, Split, Concatenate * Optimize the Data Cleaning Process: 35:11, 38:27, 39:36, 40:00, 41:18 (Functions: COUNTIF, LEN, & Conditional formatting, LEFT, RIGHT, MID, TRIM, CONCATENATE,..) * Data perspectives: Sorting, Filtering, Pivot Table, VLOOKUP, Plotting * Even more data cleaning techniques: Data mapping, Compatibility, Schema, Primary Key, Foreign Key

@sustainability.s 2 жыл бұрын

With clarity, eloquently and in simple language concepts are explained. Much appreciated and anyone interested in data analytics & related disciplines could learn a lot.

@robinpuerta 2 жыл бұрын

Excellent summary of key functions on Spreadsheets for data cleaning!

@nanasophia6242 2 жыл бұрын

So easy to understand. Thank you so much!

@akin242002 3 жыл бұрын

This videos are awesome!!!

@minjinjargalsaikhan7325 4 ай бұрын

Thank you so much. I would love to see your videos more. I really needed this well explained content. Thank you. You are the best!

@ksumar 9 ай бұрын

Nicely explained. Very clear vocabulary and examples. I've not really used Google Sheets but Excel is the King of tools I use. Some great tips were given, thank you!

@kakayemi 2 жыл бұрын

When you are able to clean you data, your analysis begins and that is where it all starts, data cleaning. cleaning data is critical to a good analysis

@ivanklful 2 жыл бұрын

I've past through the entire course and I had completed it in period between July and November 2021, this year, and I earned certificate. I would say that the course is really awesome in many aspects, one of which is data cleaning jobs searching!

@damondjackson7239 2 жыл бұрын

do you have an update? Did you get a job?

@RockstahRolln 2 жыл бұрын

Thank you for your input! Are you currently employed?

@jslime6713 7 ай бұрын

I got employed

@ditsaphongthep827 7 ай бұрын

Her section is the best of this course.

@fuehrer_tb5597 2 жыл бұрын

keep in mind that data cleaning is the hardest and the most time consuming phase in data analysis..

@oluyomifadipe5634 Жыл бұрын

Yep. Finding this out the hard way🤯

@taiwoakinosho7982 7 ай бұрын

Interesting stuff. I don't use conditional formatting to find errors that much. I use filters and inspect the dropdown for inspecting anomalies. The dropdown contains unique values anyway.

@brendamg7298 2 жыл бұрын

Thank you so much!

@AnneLopezlovesLife 2 жыл бұрын

Done watching. Thanks for freely sharing this Google :)

@sanjayrajbanshi7698 2 жыл бұрын

Beauty with the brain. Clearly explanation!

@WidianiLarasati Ай бұрын

Easy to understand even for a very beginner like me!

@LaCorvier Жыл бұрын

Thank you !!!!

@beetelvj10 Жыл бұрын

This session is eazy n engaging, it's can be more effective if the whole screen in the vedio becomes the computer screen n the instructor holds a small place at the corner...it's solves the problem for those who are using it in mobile , and sometimes the text becomes hazy n hard to read.

@nicouekuete8842 Жыл бұрын

This is good!

@fevenasefa1865 2 жыл бұрын

Thank you so much I get my certificate last month!!

@user-si6iz9fj1f Жыл бұрын

Thank you

@Tanaka-Buchou 3 жыл бұрын

Thank you, Google.

@Mrroy08657 10 ай бұрын

Plz provide this Data Sets where I can access the MULTIPLE Data Sources for DATA CLEANING Portfolio Projects.

@vazdabilo6983 4 ай бұрын

how to get this data u are clearing so we can follow ?

@shreeshree4270 8 ай бұрын

Can We Have A Video On Cleaning A Database With Multiple Column Header Like, Subject, Term1 & 2, Unit tests For Yearly Resuult Of a School

@federicofiorio6996 2 жыл бұрын

12:50 The rows #27 and #31 are not duplicates, they have different SO number and different amount of dollars transfered

@adamyapgoyal 2 жыл бұрын

Needs more upvotes!

@pablovelasquez9806 2 жыл бұрын

If you paid more attention you would've heard that the data she was looking for at that point was "How many users you have", in that sense both accounts for Elaine, regardless of expenditure or any other variable, belong to the same user, therefore they are in fact duplicates.

@andilensele247 2 жыл бұрын

@@pablovelasquez9806 as long as the column values in those 2 rows are not exactly the same then they are not duplicates. The 2 rows are unique and cannot simply delete because you losing some information !!

@tsaoh5572 Жыл бұрын

@@pablovelasquez9806 As someone with an extremely generic name, just because the same ‘names’ occur in a dataset, doesn’t mean they’re actually the same people. Even if they share the same address! (Could be a son named after a father)

@user-in1gh2zb2z Жыл бұрын

#playlist#view#all

@usmaniqbal1836 2 жыл бұрын

Please share practice file..

@fathimak9434 Жыл бұрын

How do we deal with false positives?

@tabishkhan-qz2vz 3 ай бұрын

where are these excel files???? can find them anwhere... any help is welcome

@adamyagogreen 9 ай бұрын

please provide this dataset

@user-in1gh2zb2z Жыл бұрын

#history#view#all

@keylanoslokj1806 7 ай бұрын

We have an Excel file with 10 columns and 500 rows. Last.4 columns have years and sales. There are blanks there but are randomly distributed. We want to delete the rows that have 4 blanks in a row. How would you go on about it?

@MrEveloff 7 ай бұрын

Hi! Add filters to the columns using the filter button, then filter on blank cells on each of the 4 columns, you should find your empty lines in a second. Hope this helps!

@keylanoslokj1806 7 ай бұрын

@@MrEveloff how to isolate, select en mass, and delete Only those who have all 4 horizontally cells in a row blank? Cause in that whole range you can have rows which have from 0-4 blank ones randomly distributed.

@MrEveloff 7 ай бұрын

@@keylanoslokj1806 Select the columns you want to filter, add a filter by clicking the filter button, then on each column select the blank cell to filter on empty cells - the order does not matter as you want to select only rows with all 4 cells empty. There you have all the empty rows appearing. -> If you're using Google Sheets: select the whole lines then right click and click "Delete the selected lines" which will delete only the lines you selected. -> If you're using Excel you will need to select the filtered lines then type Alt+; to select only the filtered lines, then right click and delete the lines. This is a quick solution, there are other more complex ones but this one seems the most adapted to the situation you described ;)

@musicbox6574 11 ай бұрын

Is this included in Google data analytic certificate offered by coursera?

@GoogleCareerCertificates 11 ай бұрын

Yep! All of our lessons on KZfaq are the same as the lessons offered on Coursera.

@stevesmith2553 2 жыл бұрын

That a DBA

@TanmoyTheDeadBoy 9 ай бұрын

She's too cute to sound this serious. 😶😅🥰

@pewolo_nyenh 6 ай бұрын

All the errors mentioned here can be avoided using a database!

@calmmind3160 Жыл бұрын

why is google saying to fix problems manually in a spreadsheet? such a bad practice....... give me the way to do it like a professional using 100k records

@amaebarnes 11 ай бұрын

That's exactly what I'm saying. What a waste of time. Just do everything manually? Wow thanks for nothing

@geelemo 4 ай бұрын

This course is on KZfaq for free?? Why am i paying on coursera then lol

@GoogleCareerCertificates 3 ай бұрын

Hi! On our KZfaq channel, we offer the videos so you can get a preview of the content before enrolling, but it is only through Coursera that you will receive your certificate for completing the program. The full certificate program on Coursera also includes assessments, readings, and hands-on labs.