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SQL Quiz. Previous Next . You can test your SQL skills with W3Schools' Quiz. The Test. The test contains 25 questions and there is no time limit. The test is not official, it's just a nice way to see how much you know, or don't know, about SQL. Count Your Score. You will get 1 point for each correct answer.
May 29, 2024 · Explore over 100 SQL interview questions and exercises. Get preparation tips and confidently tackle your SQL interview.
- Agnieszka Kozubek-Krycuń
- SQL Interview Questions at A Glance
- General SQL Interview Questions For Beginners
- Technical SQL Interview Questions For Beginners
- 40 Top Intermediate SQL Interview Questions and Answers
- Conclusion
Throughout this article, we'll explore a range of SQL interview questions and answers for practitioners at the beginner and intermediate levels. If you're looking for an overview, we've compiled some top tips below:
To kick off, before asking you technical questions, your interviewer may ask you some general questions about your overall experience with SQL. You can expect the following questions: 1. What SQL flavors are you familiar with? 2. How can you estimate your level of proficiency in SQL? 3. For how long have you been working in SQL? While this informat...
Now, let's move on to the technical SQL interview questions and some potential answers to them. When answering technical questions, the best strategy is to give as precise answers as possible. It may look like an attempt to deviate from the main topic. In addition, it may provocate additional questions about which you can feel less confident.
In this section, we take a look at the 40 most popular intermediate SQL questions and answers, so that you'll know what to expect from your interviewer. These questions are more suited to SQL practitioners with a few years of experience.
To sum up, we discussed the 80 essential beginner and intermediate SQL interview questions and the right answers to them. Hopefully, this information will help you to get ready for the interview and feel more confident, whether you're looking for a job in SQL or hiring candidates for an intermediate SQL position. If you feel that you need more trai...
- Write a SQL query to fetch “FIRST_NAME” from the Student table in upper case and use ALIAS name as STUDENT_NAME. SELECT upper(FIRST_NAME) as STUDENT_NAME from Student;
- Write a SQL query to fetch unique values of MAJOR Subjects from Student table. SELECT DISTINCT MAJOR from STUDENT; or SELECT MAJOR FROM STUDENT GROUP BY(MAJOR);
- Write a SQL query to print the first 3 characters of FIRST_NAME from Student table. SELECT SUBSTRING(FIRST_NAME, 1, 3) FROM Student;
- Write a SQL query to find the position of alphabet (‘a’) int the first name column ‘Shivansh’ from Student table. SELECT INSTR(FIRST_NAME, 'a') FROM Student WHERE FIRST_NAME = 'Shivansh';
- What Is a JOIN in SQL? JOIN is an SQL command that allows you to combine two or more tables. This is done via a common column (i.e. a column that has the same values in both tables), which allows using data from two or more tables at the same time.
- What Is the Difference Between INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN? There are different types of joins in SQL. The most commonly used joins are INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.
- What Is a CROSS JOIN? A CROSS JOIN is another join type available in SQL. It returns a Cartesian product. This means that CROSS JOIN will return each row from the first table combined with each row from the second table.
- What Is a Self-Join in SQL? As you probably suspect, a self-join occurs when the table is joined with itself. It’s important to note that it’s not a distinct command in SQL: any JOIN type can be used to join a table with itself.
Mar 21, 2024 · SQL interview questions for experienced users usually contain some trick (y) questions. Interviewers use them to test your gumption, which is typically a result of extensive experience and a high level of SQL knowledge. I will show you 15 tricky SQL interview questions (mostly coding) in this article.
3 days ago · Explore the Top 70+ SQL Interview Questions for beginners and experienced professionals. Master fundamental concepts, complex queries, database design, indexing, and performance tuning to ace your SQL interviews with top companies.
