Each and every concept related to dirty data, Data integrity, Data Cleaning etc.. Are explained in a nice way with awesome analogies.... Loved it...

Great material and great quality of explanation on excel and SQL functions.

Learned a lot of solid important concepts which help in real-life work.

Those techniques are quite useful and easy to understand.

I love the teacher and her expressions. Excelent course!

Sally is amaaaaaazing

Great foundational course. I would add more hands-on time in labs; however, each individual can do this on their own. Overall, I'm satisfied with the instructional delivery and the content of this certificate.

I really appreciate the effort to build the program. This course was very informative, but not very supported with a good amount of hands-on activity. From point of view, I see the weekly challenge and course challenge - in this course - only rate the conceptual knowledge of the learner, and very few technical commands in SQL and spreadsheet. Don't miss understand me, but this does not build confidence in learner’s knowledge with the technical side. I would like to give few suggestions in regard what I experienced.

1 - The concept and principles of data analytics should be gathered ALL in one course, instead of dividing them on several course of the program. Thus open the way for more hands-on activity and practice assignments.

2 - In weekly challenge, I suggest to be as a data set to be cleaned, and the work of the learners is reviewed by the instructor’s team.

3 - In SQL parts, there it was not a reading part that summarize what have been said and explained in the videos.

4 - I expected more practice assignment on the SQL, but there was very few. I suggest more in this part.

5 - The resume part was out of context, it should be in the last course of the program to sum up everything introduced in the course, thus helping the learning to link them up together in a more meaningful way.

6 - Please SERIOUSLY consider all the feedbacks that suggest to re-doing this course.

My least favorite course of the program so far. I realize it's being revamped for early Nov, so it'll (hopefully) be moot at that point. Instructions were not clear, I needed MANY outside sources to finish projects and answer Qs, and what was taught in the class wasn't reflected in the exams, ie it didn't work when I had to use the SQL taught in the class. Super frustrating, considering I thought this would teach me start-to-finish about SQl, and it didn't. Learned a handful of queries with instruction that went WAY too fast, and most of what I learned I had to learn elsewhere. Lots of repetition that was unnecessary.

The only reason I am giving a 3 is because I really liked the instructor. She was very natural at it. The course, however, could've been much better. The course / weekly challenges a lot of times feels TOO EASY. For example when asked to write s SQL query, 90% of the query has already been written for us. Basically, there's as little as no chances for us to make a query mistake. How are we supposed to learn if we don't make mistakes??

I'm only going to give this course 3 stars because of sally instruction skills and enthusiasm, she's a great instructor that give this course some value, and although this course has more value than any other course in the program, it's not enough to teach you anything concrete or valuable, the entire program is just a waste of time unfortunately....

This is course is really informative, but requires more hands on projects to practice skills. Also, not coursera's fault, but google needs a way to expand the BigQuery Sandbox with importing or adding data. It doesn't seem helpful if you have a new function in SQL, but you can't practice it.

Learned a few cool things about Confidence Intervals and calculating how much data you need to reliably analyse it. However, the main purpose of this course (cleaning the data) is poorly taught.

I wish there were more labs on SQL. I learned a little, but not enough to feel confident in doing it on my own yet. I'll been supplemental material or other courses to enhance my background.

The course was going good unless you introduced about resume making. Please stick to primary objectives, you can put this together in an additional course at the end of the program.

50% of the course was exciting where we learned about SQL and Spreadsheets queries etc., and the remaining 50% was boring and not very exciting.

Interesting, it provide a general vision of the data cleaning context but too basic to improve spreadsheets and SQL technical skills.

The videos are interesting, but not enough information. The materials in Reading category could have been more substantial.

Course spent too much time on resume building and soft skills. Those things would be best covered in their own course.

It's already the 4th module and it's still very basic and repetitive.

Not many objectively speaking important topics right here.

make it more practical learning

Instead of balancing the material between the courses, course 1 through 3 have very little substantial learning opportunities. Some subjects are briefly touched on during these courses. The 4th course is presented in way as if you have been working with the bigquery for years, although you have barely had the opportunity to use it. During several of the videos, the "instructor" starts discussing a work source but you can't be sure to which she is referring to, the last one? The one before that? yesterdays? Who knows. If you want to thoroughly complete all assignments but run into a problem, you will receive zero help. All that is offered is vague help articles that you can spend hours combing through only to find unanswered questions or a suggestion to seek help elsewhere. you would think there would be some kind of chat or help available considering the length and cost of the program. I am currently working on Course 4, the further I get into completing all 8 courses, the more disappointed I become. You can be certain that most of the glowing reviews are from young people thinking they may have some future working for google. I am 54 years old and have been a quality assurance professional for over 30 years. I have dozens of training certificates and I understand quality better than most.

4th course in the certification and still too much of a "talking head" and not enough possibilities to learn appropriate practical skills by following the instructor and by exercises. It barely touches the surface of SQL and spreadsheets. It's difficult to specify the target audience - sometimes we hear the instructor explaining very basic concepts for a long time, the other time she presents something in BigQuery or Kaggle and doesn't explain properly the context or purpose of the activities. Oh, and spelling out the name of the database over and over again while writing queries instead of fully explaining the logic behind using this or that in the query to resolve a given problem, was ridiculous.

I still don't see the point in the self-reflection parts - I was asked several times "why data cleaning is important" and even the suggested responses were nearly the same in each part.

Not to mention the obvious thing already described by other users - the resume part is out of place and should be included in a separate course.

The most positive aspect was the instructor herself - it seems that the teaching role was more natural for her than for the previous instructors.

I liked the theoretical part of the course but it severely lacks opportunities for practice. If I had only taken this course, I would have learnt very little about either SQL or EXCEL. Thankfully I found other resources online to practice with. Instead of including very short almost out of context case studies, I would recommend including a more comprehensive one at the end of the course. All in all, I did gain useful knowledge but the imbalance between theory and practice is hugely disappointing, esp. given the promise they make about making you job ready by the end.