The use of comparison operators like <,> or = can be done in a subquery. These kinds ofSQL Interview Questionsare a bit difficult to understand and answer accordingly. There are a lot ofSQL Interview Questionsapart from this, which the candidates must practice qualifying for the interview. Fo...
It is the collection of schemes, tables, queries, reports, views and other objects.Syntax: CREATEDATABASEDatabaseNameExample: CREATEDATABASE Studentor you can Create Database through Design/ Wizard form by right clicking on DATABASE option-New Database....
Comprehensive, community-driven list of essential SQL interview questions. Whether you're a candidate or interviewer, these interview questions will help prepare you for your next SQL interview ahead of time.
1. Make a note of all node names (and/or IP addresses), SQL Server virtual names along with preferred nodes. If there are more than three nodes you may need to also take note of possible owners for each SQL resource group. For my example assume that I have a cluster with node1 and...
4. What is the difference between pessimistic locking and optimistic locking? 5. What are the user roles available in SSRS? 6. Can you write a query to find nth highest salary of an employee? 7. Write a query to delete duplicate records from a table. Note: Write queries that suits...
Softwaretesting-QuestionsandAnswers-SQLInterviewQuestions Q.WhatdoesSQLstandfor? A.StructuredQueryLanguage Q.Whatisaprimarykey? A.Primarykey:EachrowofthedatainatableuniquelyidentifiedbyaPrimaryKey Thecolumn(columns)thathascompletelyuniquedatathroughoutthetableis ...
BEGIN: The executable section where SQL queries and procedural statements are written. EXCEPTION(Optional): Handles runtime errors and exceptions to ensure graceful error recovery. END;: Marks the end of the block. 3. What are the essential PL/SQL data types?
they are just used to speed up queries. Effective indexes are one of the best ways to improve performance in a database application. A table scan happens when there is no index available to help a query. In a table scan SQL Server examines every row in the table to satisfy the query ...
Before the big day, be sure to carefully study the different types of JOIN clauses and be prepared to answer JOIN-centric questions from your recruiter.Here are 5 practice interview questions to get you started.New: Sign up for a free SQL mini-course Make sure you're prepared for the ...
The UNION operator merges the results of two tables and eliminates duplicate rows from the tables. The MINUS returns the rows from the first query but not from the second query. The INTERSECT returns the rows that are returned by both of the queries. ...