The questions and answers are covered using every detail possible and they also contain queries as and where necessary. This ensures that you learn every bit of it and be well-prepared for the interview. To begin with, we will cover the basic concepts about SQL. Further, we will move towar...
Frequently asked SQL Server Interview Questions and Answers for freshers, intermediate, and experienced which will definitely ace your SQL Server Interview.
Softwaretesting-QuestionsandAnswers-SQLInterviewQuestions Q.WhatdoesSQLstandfor? A.StructuredQueryLanguage Q.Whatisaprimarykey? A.Primarykey:EachrowofthedatainatableuniquelyidentifiedbyaPrimaryKey Thecolumn(columns)thathascompletelyuniquedatathroughoutthetableis ...
Useful SQL books for novices will also offer you some instances of databases that work excellently with SQL queries like MySQL, Oracle, MongoDB, etc. Just like any subject, the benefit of SQL queries exhibits a learning curve to it that can be well comprehended to make the most of it. T...
Intermediate PL/SQL Interview Questions Having covered the basic questions, now let's move on to some intermediate-level data structure interview questions. After testing your basic knowledge, interviewers are going to now test your technical proficiency in implementing and using PL/SQL concepts. ...
Free SQL Quiz - Test your SQL knowledge with our free practice test. Strengthen your database skills and prepare for interviews with real-world scenarios.
A Common Table Expression (CTE) is a temporary result set defined within the execution scope of a singleSELECT,INSERT,UPDATE, orDELETEstatement. CTEs make complex queries easier to write and read by breaking them into simpler parts. They are particularly useful for recursive queries and can be ...
7. Write a query to delete duplicate records from a table. Note: Write queries that suits the below situation. A table is having a unique key and having duplicates records, table is not having a unique and having duplicate records.
So far we have discussed all the five categories of SQL Commands i.e DCL, DML, DDL, TCL and DQL and it’s subtypes. We’ve gone through each command in detail with its syntax and example that will assist you in writing queries. The SQL commands’ allows you to construct and manipulate...
Supports Spark SQL, Spark GraphX for graph parallel execution, machine learning libraries, etc. Key upshots: Interactive SQL queries are frequently used by data scientists, analysts, and users of general business intelligence to explore data. A Spark module for processing structured data is Spark ...