SQL Interview Questions Archives - Technology with Vivek Johari

Interview question – Is Clustered index on column with duplicate values possible?

August 13, 2015January 31, 2019 vivekjohariLeave a Comment

Through this article, we are going to discuss three important interview questions of SQL which are given below:- 1) Can we create clustered index on a column containing duplicate values? 2) Can we create a Primary Key on a table on which a clustered index is already defined? 3) If a clustered index is already defined on a […]

Question of the Month (July)

August 3, 2015April 27, 2018 vivekjohari23 Comments

Question of the Month Suppose we have a table emp_plan which contains 4 columns “Empid” (employeeid), Planid (Projectid), Startdate(Allocation Start date) and Enddate (Allocation Enddate). Its structure is given below:-4 Create table emp_plan (empid nvarchar(200),planid nvarchar(20),startdate datetime, enddate datetime) Also below is the script to enter sample data into the table:- insert into emp_plan(empid,planid,startdate,enddate) select ‘001’,’planA’,’2015-05-15′,’2015-05-30′ […]

Interview questions for database developer

November 3, 2014April 27, 2018 vivekjohari32 Comments

Technical Round Database Interview Questions 1) What are the different types of Trace flags which we used for detecting the Deadlock? 2) What are the different types of database backups? 3) How do you perform the Error handling in SQL Server? 4) What is the ACID property in SQL Server? 5) What are the best […]

Interview Questions on Sql Server -Part 3

January 31, 2010January 29, 2019 vivekjohari22 Comments

1. What are the Sql Joins? Sql Joins are the way to get data from many tables based on some logical conditions. The different types of Joins in Sql Server are 1) Inner join or Equi join 2) Self Join (it can be considered as the part of Inner join) 3) Outer Join 4) Cross […]

Interview Questions On Sql Server -Part 2

January 31, 2010January 29, 2019 vivekjohari27 Comments

1. What is the difference between the Union and Union All? 1) Union is used to select distinct data from the tables but Union All allows duplicate rows to be selected from the tables. 2) The second difference between Union and Union All can be given on the basic of their uses. Union All can […]

Interview Questions on sql server -Part-1

January 31, 2010April 27, 2018 vivekjohari24 Comments

1. What is the Normalization? Normalization:-Normalization can be defined as the process of organization the data to reduce the redundant table data to the minimum. This process is carried out by dividing the database into two or more than two tables and defining relationship between them so that deletion, updation and insertion can be made […]