SQL Interview Questions Our schema We'll be going through six questions covering topics like query performance, joins, and SQL injection. They'll refer to the same database for cakes, customers, and orders at a bakery. Here's the schema: CREATETABLEcakes(cake_idINTNOTNULLAUTO_INCREMENTPRIMARY...
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? SQL*Plus is an application that recognizes &...
But some general issues that you could talk about would be: No indexes, table scans, missing or out of date statistics, blocking, excess recompilations of stored procedures, procedures and triggers without SET NOCOUNT ON, poorly written query with unnecessarily complicated joins, too much ...
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...
JOIN Employees e2 ON e1.ManagerID = e2.EmployeeID; Self joins are useful for hierarchical data structures. 8) What is a Materialized View? How is it different from a Regular View? A materialized view stores query results physically, improving performance, whereas a regular view is just a vi...
5. What is XACT_ABORT ON? 6. Can we use two CTE’s in a single select query? 7. What are the different join operators in SQL Server? 8. Can we use a table variable inside a nested stored procedure if the table variable created in parent stored procedure?
SQL Interview Questions with Answers This guide lists out a few of the most asked SQL interview questions and gives their answers such as JOINS, KEYWORDS, TRIGGERS and much more.
query. Q.Whatiscorrelatedsub-query? ACorrelatedsub_queryisasub_querywhichhasreferencetothemain query. Q. What is an Integrity Constraint ? A Integrity constraint is a rule that restricts values to a column in a table. Q. What is Referential Integrity ?
Schau dir unsere SQL-Joins Tutorium und unseren Leitfaden zu SQL-Joins für Interviewfragen. 17. Welche Arten von Verbindungen kennst du? (INNER) JOIN - gibt nur die Datensätze zurück, die eine definierte Join-Bedingung in beiden (oder allen) Tabellen erfüllen. Das is...
SQL Server Interview Questions for a Data/BI Analyst If you're interviewing for a Data Analyst or BI Analyst role, you'll likely encounter questions focused on your ability to analyze and present data insights. Let's delve into some common interview questions tailored toward these positions. ...