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: CREATET
24 :: What is sql Correlated Subquery? Correlated Subquery is a subquery that is evaluated once for each row processed by the parent statement. Parent statement can be Select, Update or Delete. Use CRSQ to answer multipart questions whose answer depends on the value in each row processed by...
The SQL Joins refer to combining rows from two or more tables based on a related column between them. Various types of Joins can be used to retrieve related data, and it depends on the relationship between tables. There are four types of Joins: Inner Join: returns records that have matchin...
Full join:In MySQL, the use of full joins is done to return all the records at that time when a match is found between two or more tables. Hence, the following returns all the rows from the table on the left-hand side along with the tables on the right-hand side. 14) How can yo...
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. ...
Important thing to note: By default a clustered index gets created on the primary key, unless specified otherwise. 10. What's the maximum size of a row? 8060 bytes. Don't be surprised with questions like 'what is the maximum number of columns per table'. Check out SQL Server books ...
1. What is connection pooling in sql server? 2. Difference between partition by and patindex 3. What are the database design patterns? 4. What are the storage models in OLAP? 5. What is the difference between CROSS / OUTER APPLY AND JOINS in T-SQL?
SQLInterviewQuestionsForSoftwareTesters Softwaretesting-QuestionsandAnswers-SQLInterviewQuestions Q.WhatdoesSQLstandfor? A.StructuredQueryLanguage Q.Whatisaprimarykey? A.Primarykey:EachrowofthedatainatableuniquelyidentifiedbyaPrimaryKey Thecolumn(columns)thathascompletelyuniquedatathroughoutthetableis ...
SQL Data Engineering Interview Questions SQL interview questions for data engineerscover fundamental concepts like joins, subqueries, case statements, and filters. In addition, if required to write SQL code, it could test if you know how to pull metrics or questions that determine how you handle ...
SQL queries with basic group by self joins and inner queries. The problem could be solved by analytical queries. SQL and why is the number of likes increasing? There’s a game where you are given two fair six-sided dice and asked to roll. If the sum of the values on the dice equals...