Landing a job that requires SQL skills often means preparing for a challenging interview. SQL is a foundational technology for database management, so employers test candidates on various concepts ranging from basic to advanced-level queries. This blog covers common SQL interview questions and their ...
It is the collection of schemes, tables, queries, reports, views and other objects.Syntax: CREATEDATABASEDatabaseNameExample: CREATEDATABASE Studentor you can Create Database through Design/ Wizard form by right clicking on DATABASE option-New Database....
Are you familiar with SQL queries? What are the different parts of an SQL Statement? 这是一道BA岗位的面试题,虽然BA面试中对SQL没有严苛的考察,但如果你具备SQL和关系数据库技术方面的技能,则会为你的面试表现加分。推荐回答范例如下: An SQL statement has three parts. There is the Data Definition Lan...
A query, in SQL, is a command used to request data or update information from a database table or combination of tables. Users can write and execute queries to retrieve, delete or update information in a database. Usually, a query response returns data from different tables within the data...
Q. I wanted to know what are the maximum worker threads setting and active worker thread count onsqlserver. Can you tell me how to capture this info? What’s the default value for max thread count? Ans: We can check the current settings and thread allocation using the below queries. ...
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 used to improve the readability and maintainability of your SQL code....
A subquery must be put in the right hand of the comparison operator, and A subquery cannot contain a ORDER-BY clause. A query can contain more than one sub-queries. What are types of sub-queries? Single-row subquery, where the subquery returns only one row. ...
4. What is the difference between pessimistic locking and optimistic locking? 5. What are the user roles available in SSRS? 6. Can you write a query to find nth highest salary of an employee? 7. Write a query to delete duplicate records from a table. Note: Write queries that suits...
18. What is a join and explain different types of joins Joins are used in queries to explain how different tables are related. Joins also let you select data from a table depending upon data from another table. Types of joins: INNER JOINs, OUTER JOINs, CROSS JOINs.OUTER JOINs are further...
The hard part of these SQL interview questions is that they are abstract. The tasks say to “imagine the data sets” and show only a few lines of them. When you get an exercise like that, it helps a lot if you have seen similar datasets and solved similar problems before. I hope sol...