This blog on top SQL interview questions with answers has the most asked interview questions from top MNCs like Google, Microsoft, and Meta to help you crack your next SQL interview. These questions include SQL
This blog on top SQL interview questions with answers has the most asked interview questions from top MNCs like Google, Microsoft, and Meta to help you crack your next SQL interview. These questions include SQL interview questions for freshers and experienced, as well as query and scenario based...
15. What is a Self-Join? A self JOIN is a case of regular join where a table is joined to itself based on some relation between its own column(s). Self-join uses the INNER JOIN or LEFT JOIN clause and a table alias is used to assign different names to the table within the query...
Self-join is to join a table itself I.e., using a normal join condition we can join a table with the same table again on basis of columns. It is generally used for getting a hierarchal kind of data or comparing rows with the same table. The general scenario of this join is getting ...
On the other hand, the command of TRUNCATE removes all the rows in the table. This is one of the basicSQL Interview questionsthat can be asked. 20) What are the different kinds of normalization and explain the following? There are a lot of successive levels of normalization. The following...
172 SQL Questions and Answers:SQL Job Interview Questions Table of Contents: What is SQL (Structured Query Language)? What is the SQL*Plus? What is NVL? What is a Character Functions? What is SET? What is a TTITLE & BTITLE? What is sql BREAK? What is sql JOIN? What is sql ...
14. Explain Self-Join with an Example The self-join meansjoining one table with itself. We can use the Self-Join on a table only if it has a column (we will call it A) that serves as the primary key and another column (that we will call Y) that stores values that can correspond...
Self join is just like any other join, except that two instances of the same table will be joined in the query. Here is an example: Employees table which contains rows for normal employees as well as managers. So, to find out the managers of all the employees, you need a self join....
Softwaretesting-QuestionsandAnswers-SQLInterviewQuestions Q.WhatdoesSQLstandfor? A.StructuredQueryLanguage Q.Whatisaprimarykey? A.Primarykey:EachrowofthedatainatableuniquelyidentifiedbyaPrimaryKey Thecolumn(columns)thathascompletelyuniquedatathroughoutthetableis ...
SQL - Interview QuestionsSQL - JOINThe SQL JOIN clause is used to combine rows of two or more tables based on common column between them. There are four types of JOINs in SQL: INNER JOIN: It is sometimes called simple JOIN. It returns records based on matching rows in both tables. LEFT...