DBMS Interview Questions 2022 | MySQL Interview Questions 2022 | DBMS Most Asked Interview Questions

Ques: What is a database?

Ans: A information may be a logically coherent assortment of information with some inherent that means, representing some facet of the globe and that is meant, designed, and inhabited with information for a selected purpose.

Ques: What is DBMS?

Ans: It is a set of programs that permits users to form and maintain info. In alternative words it’s general computer code that has the users with the processes of shaping, constructing, and manipulating the info for numerous applications.

Ques: What is a Database system?

Ans: The database and DBMS software together is called a Database system.

Ques: What are the advantages of DBMS?

Ans:

  1. Redundancy is
  2. Unauthorized access is
  3. Providing multiple user
  4. Enforcing integrity
  5. Providing backup and

Ques: What are the disadvantages of a File Processing System?

Ans:

  • Data redundancy and
  • Difficult in accessing
  • Data  Data integrity.
  • Concurrent access is not
  • Security

Ques: Describe the three levels of data abstraction?

Ans: There are three levels of abstraction:

  1. Physical level: The lowest level of abstraction describes how data are
  2. Logical level: The next higher level of abstraction, describes what data are stored in database and what relationship among those data.
  3. View level: The highest level of abstraction describes only part of entire

Ques: Define the “integrity rules”?

Ans: There are two Integrity rules.

  1. Entity Integrity: States that “Primary key cannot have NULL value”
  2. Referential Integrity: States that “Foreign Key can be either a NULL value or should be Primary Key value of other relation.

Ques: What are extension and intention?

Ans:

  1. Extension: It is the number of tuples present in a table at any This is time dependent.
  2. Intension: It is a constant value that gives the name, structure of table and the constraints laid on

Ques: What is System R? What are its two major subsystems?

Ans: System R was designed and developed over the period of 1974-79 at IBM San Jose Research Center. It is a prototype and its purpose was to demonstrate that it is possible to build a Relational System that can be used in a real-life environment to solve real-life problems, with a performance at least comparable to that of the existing system.

Its two subsystems are:

  • Research Storage
  • System Relational Data

Ques: How is the data structure of System R different from the relational structure?

Ans: Unlike Relational systems in System R:

  1. Domains are not supported
  2. Enforcement of candidate key uniqueness is optional
  3. Enforcement of entity integrity is optional
  4. Referential integrity is not enforced

Ques: What is Join?

Ans: An SQL Join is used to combine data from two or more tables, based on a common field between them. For example, consider the following two tables.

Student Table

ENROLLNOSTUDENTNAMEADDRESS
1000geek1geeksquiz1
1001geek2geeksquiz2
1002geek3geeksquiz3

Student Course Table

COURSEIDENROLLNO
11000
21000
31000
11002
21003

Following is a join query that shows the names of students enrolled in different courseIDs.

SELECT StudentCourse.CourseID, Student.StudentName FROM StudentCourse INNER JOIN Customers ON StudentCourse.EnrollNo = Student.EnrollNo ORDER BY StudentCourse.CourseID;

The above query would produce the following result.

COURSEIDSTUDENTNAME
1geek1
1geek2
2geek1
2geek3
3geek1

Ques: What is a view in SQL? How to create one

Ans: A view is a virtual table based on the result-set of an SQL statement. We can create using create view syntax.

CREATE VIEW view_name AS SELECT column_name(s) FROM table_name WHERE condition;

Ques. There is a table where only one row is fully repeated. Write a Query to find the repeated row

NameSection
abcCS1
bcdCS2
abcCS1

In the above table, we can find duplicate rows using the below query.

SELECT name, section FROM tbl GROUP BY name, section HAVING COUNT(*) > 1

Ques. What is the Query to find the 2nd highest salary of an employee?

Ans:

SELECT max(salary) FROM EMPLOYEES WHERE salary IN (SELECT salary FROM EMPLOYEEs MINUS SELECT max(salary) FROM EMPLOYEES);

OR

SELECT max(salary) FROM EMPLOYEES WHERE salary <> (SELECT max(salary) FROM EMPLOYEES);

Ques. Get employee details from employee table whose first name ends with ‘n’ and name contains 4 letters

Select * from EMPLOYEE where FIRST_NAME like '___n'; #(Underscores)

Ques. Get employee details from employee table whose first name starts with ‘J’ and name contains 4 letters

Select * from EMPLOYEE where FIRST_NAME like 'J___'; #(Underscores)

Ques. Get employee details from employee table whose Salary greater than 600000

Select * from EMPLOYEE where Salary >600000;

Ques. Get employee details from employee table whose Salary less than 800000

Select * from EMPLOYEE where Salary <  #800000

Ques. Get employee details from employee table whose Salary between 500000 and 800000.

Select * from EMPLOYEE where Salary between 500000 and 800000;

777 thoughts on “DBMS Interview Questions 2022 | MySQL Interview Questions 2022 | DBMS Most Asked Interview Questions”

  1. I think this is one of the most significant information for me. And i’m glad reading your article. But want to remark on few general things, The site style is ideal, the articles is really nice : D. Good job, cheers

    Reply
  2. Nice post. I was checking continuously this blog and I am impressed! Very useful information specially the last part 🙂 I care for such info a lot. I was seeking this particular info for a long time. Thank you and good luck.

    Reply
  3. Greetings! This is my 1st comment here so I just wanted to give a quick shout out and tell you I truly enjoy reading through your blog posts. Can you suggest any other blogs/websites/forums that deal with the same subjects? Thanks a lot!

    Reply
  4. Thanks for ones marvelous posting! I really enjoyed reading it, you can be a great author.I will be sure to bookmark your blog and will often come back down the road. I want to encourage one to continue your great posts, have a nice day!

    Reply
  5. Simply want to say your article is as amazing. The clearness on your publish is simply spectacular and i can think you are a professional in this subject. Well together with your permission allow me to seize your RSS feed to stay up to date with drawing close post. Thank you a million and please keep up the gratifying work.

    Reply
  6. This design is wicked! You obviously know how to keep a reader entertained. Between your wit and your videos, I was almost moved to start my own blog (well, almost…HaHa!) Great job. I really enjoyed what you had to say, and more than that, how you presented it. Too cool!

    Reply
  7. I love your blog.. very nice colors & theme. Did you design this website yourself or did you hire someone to do it for you? Plz reply as I’m looking to design my own blog and would like to know where u got this from. thanks a lot

    Reply
  8. Its like you read my mind! You seem to know so much about this, like you wrote the book in it or something. I think that you could do with some pics to drive the message home a bit, but other than that, this is fantastic blog. A great read. I’ll definitely be back.

    Reply
  9. My brother suggested I might like this website. He was totally right. This post actually made my day. You cann’t imagine just how much time I had spent for this information! Thanks!

    Reply
  10. This is very interesting, You are a very skilled blogger. I have joined your feed and look forward to seeking more of your magnificent post. Also, I have shared your site in my social networks!

    Reply
  11. I used to be recommended this blog via my cousin. I am now not sure whether this submit is written through him as no one else recognize such particular approximately my difficulty. You are amazing! Thank you!

    Reply
  12. I don’t even know how I ended up here, but I thought this post was good. I don’t know who you are but definitely you are going to a famous blogger if you are not already 😉 Cheers!

    Reply
  13. I have been surfing online more than three hours today, yet I never found any interesting article like yours. It’s pretty worth enough for me. Personally, if all site owners and bloggers made good content as you did, the net will be much more useful than ever before.

    Reply
  14. This is hands down one of the greatest articles I’ve read on this topic! The author’s extensive knowledge and zeal for the subject shine through in every paragraph. I’m so appreciative for coming across this piece as it has enriched my knowledge and stimulated my curiosity even further. Thank you, author, for taking the time to create such a remarkable article!

    Reply
  15. Hello there! I know this is kinda off topic however , I’d figured I’d ask. Would you be interested in exchanging links or maybe guest writing a blog article or vice-versa? My site goes over a lot of the same subjects as yours and I believe we could greatly benefit from each other. If you happen to be interested feel free to send me an e-mail. I look forward to hearing from you! Terrific blog by the way!

    Reply
  16. Great goods from you, man. I’ve understand your stuff previous to and you’re just too fantastic. I really like what you’ve acquired here, really like what you’re stating and the way in which you say it. You make it entertaining and you still take care of to keep it smart. I can not wait to read far more from you. This is actually a terrific site.

    Reply
  17. Hey there! I know this is somewhat off topic but I was wondering which blog platform are you using for this site? I’m getting fed up of WordPress because I’ve had issues with hackers and I’m looking at options for another platform. I would be great if you could point me in the direction of a good platform.

    Reply
  18. I’m not positive where you are getting your info, however good topic. I needs to spend a while learning more or understanding more. Thank you for great information I used to be looking for this information for my mission.

    Reply
  19. I think this is one of the most significant information for me. And i’m glad reading your article. But wanna remark on few general things, The website style is great, the articles is really excellent : D. Good job, cheers

    Reply
  20. Having read this I thought it was very informative. I appreciate you finding the time and effort to put this article together. I once again find myself spending a significant amount of time both reading and commenting. But so what, it was still worth it!

    Reply
  21. My brother suggested I would possibly like this blog. He used to be totally right. This post actually made my day. You cann’t believe just how so much time I had spent for this information! Thank you!

    Reply
  22. Хотите получить идеально ровный пол без лишних затрат? Обратитесь к профессионалам на сайте styazhka-pola24.ru! Мы предоставляем услуги по стяжке пола м2 по доступной стоимости, а также устройству стяжки пола под ключ в Москве и области.

    Reply
  23. What i do not realize is actually how you’re not really a lot more well-favored than you may be right now. You are so intelligent. You know therefore significantly in terms of this matter, produced me in my opinion believe it from numerous various angles. Its like men and women don’t seem to be fascinated unless it’s something to accomplish with Lady gaga! Your personal stuffs excellent. All the time deal with it up!

    Reply
  24. Эффективный, быстрый и качественный процесс ремонта это то, что мы предлагаем в виде механизированной штукатурки на mehanizirovannaya-shtukaturka-moscow.ru.

    Reply
  25. Its like you read my mind! You seem to know so much about this, like you wrote the book in it or something. I think that you could do with some pics to drive the message home a bit, but other than that, this is fantastic blog. A great read. I’ll definitely be back.

    Reply
  26. This is the right site for anybody who would like to find out about this topic. You realize so much its almost hard to argue with you (not that I actually would want toHaHa). You definitely put a brand new spin on a topic that has been written about for many years. Excellent stuff, just excellent!

    Reply
  27. You really make it seem so easy with your presentation however I in finding this topic to be really something which I think I might never understand. It sort of feels too complicated and very extensive for me. I am looking forward for your next post, I will try to get the hold of it!

    Reply
  28. Hi! I know this is kind of off-topic but I had to ask. Does building a well-established blog like yours take a lot of work? I’m completely new to blogging but I do write in my diary on a daily basis. I’d like to start a blog so I will be able to share my own experience and views online. Please let me know if you have any ideas or tips for new aspiring bloggers. Appreciate it!

    Reply
  29. Hmm it seems like your site ate my first comment (it was extremely long) so I guess I’ll just sum it up what I submitted and say, I’m thoroughly enjoying your blog. I as well am an aspiring blog blogger but I’m still new to the whole thing. Do you have any tips and hints for first-time blog writers? I’d definitely appreciate it.

    Reply
  30. When I originally commented I seem to have clicked the -Notify me when new comments are added- checkbox and now each time a comment is added I recieve four emails with the same comment. Is there a means you can remove me from that service? Thank you!

    Reply
  31. Hi there very cool blog!! Guy .. Beautiful .. Wonderful .. I will bookmark your web site and take the feeds additionally?KI’m glad to seek out numerous useful information here within the submit, we’d like develop more techniques on this regard, thanks for sharing. . . . . .

    Reply
  32. FitSpresso stands out as a remarkable dietary supplement designed to facilitate effective weight loss. Its unique blend incorporates a selection of natural elements including green tea extract, milk thistle, and other components with presumed weight loss benefits.

    Reply
  33. The Quietum Plus supplement promotes healthy ears, enables clearer hearing, and combats tinnitus by utilizing only the purest natural ingredients. Supplements are widely used for various reasons, including boosting energy, lowering blood pressure, and boosting metabolism.

    Reply
  34. Sight Care is a daily supplement proven in clinical trials and conclusive science to improve vision by nourishing the body from within. The Sight Care formula claims to reverse issues in eyesight, and every ingredient is completely natural.

    Reply
  35. Brilliant piece! 💖 The depth of the information is impressive. Have you considered adding more images in your next articles? It could create a visually captivating narrative. 🖼️

    Reply
  36. Absolutely amazing! The quality of this content is outstanding. The way it was delivered is exceptional. The dedication and expertise in this work shine through. Congratulations to the author for providing such an enriching experience. I’m excited to see similar content in the future. 👏👏👏

    Reply
  37. Cortexi is a completely natural product that promotes healthy hearing, improves memory, and sharpens mental clarity. Cortexi hearing support formula is a combination of high-quality natural components that work together to offer you with a variety of health advantages, particularly for persons in their middle and late years. Cortexi not only improves hearing but also decreases inflammation, eliminates brain fog, and gives natural memory protection. https://cortexibuynow.us/

    Reply
  38. Erec Prime is a natural formula designed to boost your virility and improve your male enhancement abilities, helping you maintain long-lasting performance. This product is ideal for men facing challenges with maintaining strong erections and desiring to enhance both their size and overall health. https://erecprimebuynow.us/

    Reply
  39. Kerassentials are natural skin care products with ingredients such as vitamins and plants that help support good health and prevent the appearance of aging skin. They’re also 100% natural and safe to use. The manufacturer states that the product has no negative side effects and is safe to take on a daily basis. Kerassentials is a convenient, easy-to-use formula. https://kerassentialsbuynow.us/

    Reply
  40. You really make it seem so easy together with your presentation however I in finding this topic to be really something which I feel I would never understand. It kind of feels too complicated and very large for me. I am looking forward in your next publish, I will try to get the hang of it!

    Reply
  41. Как только я начал заботиться о своём питании, я понял, что мне нужна надежная маслодавка. Спасибо ‘Все соки’ за их прекрасный выбор. Теперь я делаю чистое и полезное масло в домашних условиях. https://h-100.ru/collection/maslopressy – Маслодавка стала важной частью моей кухни.

    Reply
  42. hey there and thank you for your information I’ve definitely picked up anything new from right here. I did however expertise a few technical issues using this site, since I experienced to reload the site a lot of times previous to I could get it to load properly. I had been wondering if your web hosting is OK? Not that I am complaining, but sluggish loading instances times will often affect your placement in google and can damage your high quality score if advertising and marketing with Adwords. Anyway I’m adding this RSS to my e-mail and can look out for a lot more of your respective intriguing content. Make sure you update this again soon.

    Reply
  43. Hey, I think your website might be having browser compatibility issues. When I look at your blog in Chrome, it looks fine but when opening in Internet Explorer, it has some overlapping. I just wanted to give you a quick heads up! Other then that, awesome blog!

    Reply
  44. I’m now not positive where you are getting your info, however good topic. I needs to spend a while learning more or understanding more. Thank you for great information I used to be in search of this information for my mission.

    Reply
  45. Today, I went to the beach with my kids. I found a sea shell and gave it to my 4 year old daughter and said “You can hear the ocean if you put this to your ear.” She put the shell to her ear and screamed. There was a hermit crab inside and it pinched her ear. She never wants to go back! LoL I know this is entirely off topic but I had to tell someone!

    Reply
  46. Hello! I’ve been following your website for a long time now and finally got the bravery to go ahead and give you a shout out from Huffman Tx! Just wanted to tell you keep up the great job!

    Reply
  47. When I originally commented I clicked the “Notify me when new comments are added” checkbox and now each time a comment is added I get four emails with the same comment. Is there any way you can remove me from that service? Cheers!

    Reply
  48. Greetings! I know this is kinda off topic however , I’d figured I’d ask. Would you be interested in exchanging links or maybe guest writing a blog article or vice-versa? My website goes over a lot of the same subjects as yours and I believe we could greatly benefit from each other. If you happen to be interested feel free to send me an e-mail. I look forward to hearing from you! Wonderful blog by the way!

    Reply
  49. You really make it seem so easy with your presentation but I find this topic to be really something which I think I would never understand. It seems too complicated and very broad for me. I am looking forward for your next post, I will try to get the hang of it!

    Reply
  50. Hmm it seems like your site ate my first comment (it was extremely long) so I guess I’ll just sum it up what I had written and say, I’m thoroughly enjoying your blog. I as well am an aspiring blog blogger but I’m still new to the whole thing. Do you have any points for beginner blog writers? I’d definitely appreciate it.

    Reply
  51. Hi there, i read your blog occasionally and i own a similar one and i was just wondering if you get a lot of spam feedback? If so how do you prevent it, any plugin or anything you can advise? I get so much lately it’s driving me mad so any assistance is very much appreciated.

    Reply
  52. Please let me know if you’re looking for a article author for your weblog. You have some really great posts and I believe I would be a good asset. If you ever want to take some of the load off, I’d absolutely love to write some articles for your blog in exchange for a link back to mine. Please send me an e-mail if interested. Many thanks!

    Reply
  53. I blog frequently and I really appreciate your content. This article has really peaked my interest. I am going to bookmark your site and keep checking for new information about once a week. I subscribed to your RSS feed as well.

    Reply
  54. Its like you read my mind! You seem to know so much approximately this, like you wrote the ebook in it or something. I think that you simply could do with some p.c. to drive the message house a bit, however other than that, this is magnificent blog. A great read. I’ll definitely be back.

    Reply
  55. Heya! I just wanted to ask if you ever have any trouble with hackers? My last blog (wordpress) was hacked and I ended up losing months of hard work due to no data backup. Do you have any solutions to prevent hackers?

    Reply
  56. Hi there would you mind letting me know which hosting company you’re working with? I’ve loaded your blog in 3 completely different web browsers and I must say this blog loads a lot quicker then most. Can you suggest a good web hosting provider at a reasonable price? Cheers, I appreciate it!

    Reply
  57. Howdy! Someone in my Myspace group shared this site with us so I came to take a look. I’m definitely enjoying the information. I’m book-marking and will be tweeting this to my followers! Great blog and great design and style.

    Reply
  58. Nice post. I learn something new and challenging on blogs I stumbleupon everyday. It will always be exciting to read content from other writers and practice a little something from their websites.

    Reply
  59. When someone writes an piece of writing he/she keeps the thought of a user in his/her mind that how a user can understand it. So that’s why this post is amazing. Thanks!

    Reply
  60. Wow that was odd. I just wrote an very long comment but after I clicked submit my comment didn’t show up. Grrrr… well I’m not writing all that over again. Regardless, just wanted to say fantastic blog!

    Reply
  61. I was very happy to find this site. I wanted to thank you for your time just for this wonderful read!! I definitely enjoyed every bit of it and I have you book marked to see new stuff on your blog.

    Reply
  62. Undeniably believe that that you stated. Your favourite justification appeared to be at the net the simplest thing to have in mind of. I say to you, I definitely get irked whilst folks consider concerns that they plainly do not recognize about. You controlled to hit the nail upon the top as smartly as defined out the whole thing with no need side effect , folks can take a signal. Will likely be back to get more. Thank you

    Reply
  63. Terrific post however , I was wondering if you could write a litte more on this topic? I’d be very grateful if you could elaborate a little bit more. Appreciate it!

    Reply
  64. I think this is one of the most significant information for me. And i’m glad reading your article. But want to remark on few general things, The website style is ideal, the articles is really excellent : D. Good job, cheers

    Reply
  65. Thanks for the marvelous posting! I actually enjoyed reading it, you can be a great author. I will ensure that I bookmark your blog and will often come back in the future. I want to encourage one to continue your great job, have a nice afternoon!

    Reply
  66. Howdy! Would you mind if I share your blog with my zynga group? There’s a lot of people that I think would really enjoy your content. Please let me know. Thank you

    Reply
  67. It is perfect time to make a few plans for the longer term and it is time to be happy. I have read this post and if I may just I want to suggest you few interesting things or advice. Perhaps you could write next articles relating to this article. I wish to read more things approximately it!

    Reply
  68. Hello there, just became aware of your blog through Google, and found that it is really informative. I’m gonna watch out for brussels. I will appreciate if you continue this in future. A lot of people will be benefited from your writing. Cheers!

    Reply
  69. I like the valuable information you supply in your articles. I will bookmark your weblog and test again here frequently. I am fairly certain I will be told plenty of new stuff right here! Good luck for the following!

    Reply
  70. Pretty part of content. I simply stumbled upon your website and in accession capital to claim that I acquire in fact enjoyed account your blog posts. Any way I’ll be subscribing in your augment or even I achievement you get right of entry to persistently fast.

    Reply
  71. It’s really a nice and helpful piece of information. I’m glad that you simply shared this helpful info with us. Please stay us informed like this. Thank you for sharing.

    Reply
  72. I am curious to find out what blog system you happen to be utilizing? I’m experiencing some minor security problems with my latest site and I would like to find something more safeguarded. Do you have any suggestions?

    Reply
  73. Hello there, You have performed a fantastic job. I will definitely digg it and personally recommend to my friends. I am sure they will be benefited from this site.

    Reply
  74. Its like you read my mind! You seem to know so much approximately this, like you wrote the e-book in it or something. I think that you simply could do with some % to force the message house a bit, however other than that, this is great blog. A great read. I’ll definitely be back.

    Reply
  75. It’s a shame you don’t have a donate button! I’d certainly donate to this fantastic blog! I suppose for now i’ll settle for book-marking and adding your RSS feed to my Google account. I look forward to fresh updates and will talk about this blog with my Facebook group. Chat soon!

    Reply