カリフォルニア大学デービス校（University of California, Davis） による SQL for Data Science の受講者のレビューおよびフィードバック

Better than I hoped for. I learned everything I needed in order to feel competent in the basics of SQL. It was just the right amount of instruction and challenge, perfect for a beginner like me.

This is such an important course yet there is no adequate room for practice. The lectures are pretty straight forward with very minimal examples. The quizzes are like diving into the lake learning how to swim from YouTube. Just like showing us in the class that two plus two is four then asking us to calculate the mass of the sun in the exam. What is the point of doing the course and learn most of the materials and get fluent from numerous other sites by myself? This course needs immense improvements. It did waste a lot of time for me given I have done numerous courses on this platform. I would suggest the other learners to refrain from enrolling in this course until University of California, Davis makes necessary amendments for this course with proper guidance and materials. Even if you do get enrolled, learn how to swim from YouTube and practice swimming on the floor beforehand. Best of luck.

The Content of the course is good, quizzes are fine, but the final project is a total mess up, inconsistent and don't contain the course potential, so you won't be able to apply the knowledge by doing it

As a beginner, the course is easy to understand and follow, and the course teaches a lot of useful commands. However, I think the course still has a lot to imrove. Some codings in the lectures have problems (e.g. lack ','). When introducing new commands, the teacher did not show the running results of the coding example. I also think the course lacks some application in the real world. Maybe providing more real business cases will help students understand better about when some commands will be applied.

Some of the quizzes do not make sense and I have to select something that is wrong to pass. It is really hard to follow sometimes and the content of the video mostly does not relate to the content of the tests. I had to google most stuff that came up in the videos, many quotes from w3 school (another provider of programming courses).

I choose to pay for courses on coursera so that I do not have to read through tons of free material online or get quoted content that is for free on other learning platforms. This course taught me some neat things but mostly wasted my time.

I finished the first course in the series, however it quickly became apparent in the second course that the instructors are unprepared and the assignments are thrown together without student learning as a priority.

If you want to learn SQL or Database systems, I highly suggest taking "Modern Big Data Analysis with SQL" from the CLOUDERA team and "Data Warehousing for Business Intelligence" from the U Colorado team.

Both of those course paths are much more informative, structured, and up to date. You are wasting your time if you choose this path.

The final project assignment is a bit of a mess. Some of the questions are very unclear, and the database provided is incomplete in ways that make it hard to address some of the questions. I also found the lecture format and materials frustrating. I learn much better by reading and by being able to go back and reference materials, but that really isn't possible in this course -- the doesn't contain any of the actual code examples and is often really vague.

Hola, no es tan bueno que no puedas correr código mientras aprendes con ejemplos.

This course most definitely needs a revamp and an update on videos, content, exercises as well as more clearly stating what is expected from students. Honestly, I don't think the true grading is a one star, it would probably be between 2.5 and 3, but I believe that at this point if we don't give a terrible rating back, neither Coursera nor UC Davis and the faculty/staff serving this course will take action to improve it. There is a lot to be criticized/updated.

I strongly recommend you read other reviews, going back to as long as 2 to 3 years in the past where these flaws are clearly outlined and appointed by former students, and yet in Jan 2021 they are all still there. In summary:

-videos are of hardly any help. The instructor (clearly a knowledgeable person) is hindered by having to read from a teleprompter. The text given to her is not what she would've said spontaneously, so more often that not we see her get caught between what she is thinking versus what she is reading to speak, and this causes confusion during explanation of some hard to grasp moments.

-slides are static and don't provide any significant help in making the hard content really easier to understand. In a course aiming at teaching a code language, we need dynamic video content, seeing the queries being written and the resulting output, and a demonstration of how a change in parameters results in a change of the output.

-the sandbox environment for practice is extremely limited and gets in the way of allowing naive students to really understand some of the dat structure in the background.

-the gap between theory and practice is gigantic, and the code assignments at the end of each module are light years away from what was taught. This is particularly painful with the last peer reviewed assignment, which would require at least one additional full week of time after the end of the 4 modules to give students a chance to understand the data, work with it and craft their answers.

If you take this course, you will end up learning useful SQL content, but this will be at the cost of several additional hours spent googling results and support everywhere on the web. If googling was going to be our primary source of learning anyway, then what is the point of having the course in the first place? People enroll in course because they expect that the instructor, lessons and exercises will steer and help them through the initial learning before they are ready to move on their own, and this is exactly where this course fails. I came to the course already knowing other programming languages and with a good database and data background, so I could "brute force my way through googling", but I can only imagine what other less prepared students could feel. Your money is probably best spent elsewhere if you want to learn SQL (or even no money at all in some good websites on the net).

Fortunately, this was not my first introduction to SQL, or I would have been unable to complete the final assignment, or even some of the modular quizzes. There is almost no hands-on learning, just talking head videos where the instructor doesn't even show you the actual coding syntax for many of the examples. Nothing builds or is linked together conceptually. And the SQLite interface is very limited, so when it comes to the over-complicated final assignment you have to perform coding backflips to get anything meaningful out of the appalling dataset. I cannot recommend this course to anyone.

This course is incredibly poorly designed and does not provide sufficient guidance to learn SQL.

Most of the command line does not work.

In general, the course is not bad, but there are a number of disadvantages, ranging from minor to serious omissions. I wanted to give the course 3 stars, but the last homework was quite fun and productive (you can put 4.5, according to the rules of mathematics, round to 5, but with a very large advance). The basic skills were acquired during the last assignment.

First, about the benefits of the course:

1+ In the course, you can practice on real data without using other software, it is really useful and productive;

2+ Theoretical aspects are more than enough;

3+ Theoretical tests correspond to the lecture materials.

Now to the disadvantages (there are still more of them), first to the serious ones:

1- There is a lot of so-called "Water", information that is completely unimportant and purely theoretical. Almost the entire first week was devoted to theory ("Why is this subject important? Separation of duties among employees, etc.). I think the course would have done well without these materials. Often, one fourth of the length of each video is an explanation of what we will be studying today. I think , the student wants to quickly learn important material for him.

2- The first 2 weeks of coding looks very good, easy to understand and solve for yourself. But something strange happened on week 3, the tasks became much more complicated, they did not correspond to the lecture materials, where theoretical material was mainly given. Week 4 has already been done normally. Probably, without prompts (sometimes direct), I could not have done these tasks. It was very difficult!

3- The course is rather short (only 4 weeks), little time is devoted to programming, there is not enough practice, maybe it was even worth adding a small invaluable practice after each video.

4- The lecturer tried to convey the idea that the usual repetition of programming steps may be ineffective. Unfortunately, today, nothing is better than "I copy after the lecturer, who explains something in parallel, and then independently practice it on real data." The lecturer's methodology was not the most effective; nevertheless, after completing the course, many questions remain.

Minor disadvantages:

- For the convenience of work, you can download the presentation of the lecture, but I think it is convenient for some students to print these lectures and work. Unfortunately, the design and background were chosen in a dark color, which is why the material after printing is inconvenient to read (-a lot of paint is wasted), it is rather difficult to correct it yourself.

- The material chosen for reading by the lecturer is slightly robotic, it is convenient to set at a speed of 1.25 or 1.5.

In any case, I was able to familiarize myself with this programming language, I was able to learn something. I think one day it will suit me. At the moment, I still prefer to work in Python and other programs. I was still able to get a certificate of completion of the course. Thanks for the course and thanks for your attention to this long comment! Hope it helps you get better! Good luck :)

It is a very introductory course on SQL. I have never learn any SQL before and I can catch everything she said. People might find it extremely easy, but in learning programming you must make sure all the basics are well known to you before using them in more complex situations.

Excellent course in all basics of SQL.

Built-in sandbox is the most important plus of the course.

A lot of practice, a balanced number of lectures.

At the end of a good project that allows you to try out all the methods learned in the course.

Excellent.

best course for learning SQL for beginners.I learned so much from this course.the speaking language is also simple ..So i Recommended this course for beginners who's 2nd or third language is English.

Great introductory to the SQL programming. This will definitely not only add another programming skill but also give me more capabilities programming in SAS. I would recommend this to anyone.

The Course was quiet good & descriptive, yet it didn't cover a lot of SQL such as how to use its platforms and how to connect to database, also, the differences between other platforms.

This was an amazing course. I learned so much practical and application skills from the course. The lectures are great, as our the assignments and tests.

Thank you for a great time!

Great course with lots of things to learn about SQL. Assignments were pretty challenging and the instructor explained the concepts nicely. A fantastic course to start with SQL.

Sadie St. Lawrence is a completely motivating person. Thank you, Sadie, for such an excellent combination of professional teaching and interesting tasks. Well-balanced course

Very clear and useful class! The outline of each module is easy to understand and follow, and the assignment is helpful to strengthen SQL skills.

Even though i have learned SQL from many sources but this is a complete package, felt completed after completing this course.

I loved this class. It was the perfect introduction to SQL coding. It was easy to follow and I learned a ton. -Rick

So helpful! Really helped me learn SQL on a level that I am confident enough to add it to my resume.