It ensures that NULL values are not present in the table. Unique Key: Unique key also identifies each record uniquely but it can accept NULL values. Check out this SQL Interview Questions And Answers video: 2. What are ACID properties? ACID stands for atomicity, consistency, isolation, and ...
SQL Job Interview Questions and Answers 1:: What is SQL (Structured Query Language)? SQL is an English like language consisting of commands to store, retrieve, maintain & regulate access to your database. Read More 2:: What is the SQL*Plus?
Basic SQL JOINS Interview Questions and Answers for Freshers 1. What is SQL JOINS? The SQL JOIN component joins rows from one or more tables in a relational database. Create sets that can be stored in tabular form or used routinely. JOIN is to combine columns from one table or multiple ...
In this article, you will learn many simple and complex SQL queries asked in IT interviews. Let's take two tables which help in solving various queries. The name of the first table isStudent,and the name of the second table isSubject. The Student table consists ofStudent_ID, Stu_Name, ...
Recommended Reading =>>PL SQL Procedures And Functions Example: FUNCTION sqr (num IN NUMBER) RETURN NUMBER is sq NUMBER(2); BEGIN sq:= num*num; RETURN sq; END; Q #12) Differentiate between syntax and runtime errors? Answer: Syntax errorsare the one which can be easily identified by a...
There are mainly two types of indexes in SQL Servers Clustered Index and Non-Clustered Index. Conclusion Above is the list of common interview questions which you can expect as an SQL server developer. The answers are for your reference you can read them in detail using other sources or artic...
In this blog post, you are going to find a list of top 25 SQL interview questions and answers about indexes which have been often asked.
SQL Interview Questions http://career.guru99.com/top-50-sql-question-answers/ 1. What is DBMS? A Database Management System (DBMS) is a program that controls creation, maintenance and use of a database. DBMS can be termed as File Manager that manages data in a database rather than ...
An ORM library is written in our language of choice and encapsulates the code needed to manipulate the data. Therefore we don’t need to directly use the SQL; we can interact instantly with an object from our code, instead of a database table. The ORM tool translates the interaction into...
Basic & Advanced SQL Server Interview Questions And Answers Let’s start with common SQL Interview Questions first. 1. What is a Database? A database is a collection of information in an organized form for faster and better access, storage, and manipulation. It can also be defined as a co...