These questions include SQL interview questions for freshers and experienced, as well as SQL query interview questions. 1. What is the difference between a primary key and a unique key? 2. What is a constraint, and why use constraints? 3. What is the COALESCE function? 4. What are UNION...
PL SQL Interview Questions for 2 to 3 Years of Experience 39. What Does a PL/SQL Package Consist Of? A PL/SQL package consists of: PL/SQL table and record type statements Procedures and functions Cursors Variables, such as tables, scalars, records, etc., and constants ...
Landing a job that requires SQL skills often means preparing for a challenging interview. SQL is a foundational technology for database management, so employers test candidates on various concepts ranging from basic to advanced-level queries. This blog covers common SQL interview questions and their ...
7. Prepare for interviews Prepare for SQL job interviews by practicing common SQL interview questions and problems. Be ready to demonstrate your SQL knowledge through practical tests and discussions. Highlight your projects and any relevant experience during the interview. By building a strong foundatio...
Step 2 – Define Structure: Use the CREATE TABLE command to outline your temporary table’s structure. Specify its name, columns, and data types. Step 3 – Optional Data: If needed, insert data using INSERT INTO. This step is for adding specific information. ...
-1: The wait event has already been terminated and was active for less than 1/100 seconds. -2: The wait event has already been terminated, but no time information is available because timed_statistics is set to FALSE;Caution: The "waittime (sec)" column in "ST04 -> Detail analysis men...
I also let them know that this interview process was the best in my entire career. To be very sincere, I was not making up the words to impress the interviewers. I had enough experience to find another job if I was not selected for the role but I sincerely wanted to appreciate the ...
This guide listed out a few of the most asked SQL interview questions and gave their answers to begin with, to keep the post in limit. You are advised to read a more detailed answer if a question is not very clear to you.You can also go over JDBC performance tips for additional ...
Let's see how the average annual SQL developer salary in dollars varies for different experience levels in the USA in 2024: Entry-level SQL developer (0-1 year of experience) $79,010 Junior SQL developer (2-3 years of experience) $88,976 Mid-level SQL developer (4-6 years of experienc...
experience_years from Project, Employee where Project.employee_id = Employee.employee_id) select project_id, employee_id, rank() over(partition by project_id order by experience_years desc) as rnk from cte; 这里rank() 和 dense_rank() 效果一致,因为我们最后都只保留 rnk=1 的员工。