This is one of the most frequently askedSQL Interview Questionsin the interview. 6) How can you define Primary Key? A Primary Key is basically a column that verifies each row in a table. It can also be a set or cluster of columns for identifying the number of rows in a table. The s...
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...
7. Write a query to delete duplicate records from a table. Note: Write queries that suits the below situation. A table is having a unique key and having duplicates records, table is not having a unique and having duplicate records. 8. What is XACT_ABORT ON? 9. How to filter nested st...
In the future, you can add a DBMS concept module to the course and explain a few important terms that are generally asked in interviews. Overall, I enjoyed the course and the teaching style of the instructor.显示更多 有帮助吗? Aditya Sanjay B. 评分:4.0,满分 5 分3 个月前 AB Good ...
Learn how to optimize the queries written in SQL to make them execute faster and more memory efficient. SQL SQL Interviews Preparations Material Resources- Feb 21, 2023. SQL is a must-known programming language for data people, and many modern jobs have SQL as a prerequisite. Here are materia...
SQL OFFSET is a powerful clause used to skip a specified number of rows in a query result. It is often combined with the LIMIT clause for data pagination. This tutorial explores how OFFSET works, its practical applications, and best practices for optimizing your SQL queries. If you would lik...
“Who are the folks who made a difference?”I asked two weeks ago. As T-SQL Tuesday themes go, this is pretty touchy-feely stuff, and boy am I glad I went with it, because the #sqlfamily delivered in spades. Firstly, I want to thank every person who took part.SIXTY TWOblog posts...
SQL Habit teaches practical, actionable skills. You’ll write queries in the actual data warehouse of a company named Bindle. From the very first lesson, everything you learn could be applied in the real context. Bite-sized Each lesson and exercise are designed to be 15-30 minutes long, so...
To identify duplicate records in SQL, you can use the CTE (Common Table expression) or RowNumber. To later delete duplicate records in SQL, use the delete command in SQL. Also, we can use the DELETE statement within the queries to remove duplicate records. ...
Loved this question asked by Kevin Feasel for this month of T-SQL Tuesday, so here I am to write this post before this day ends. Please find the invitation here.SourceFirst, I would like to talk about my entire amazing interview process as a whole. It was multiple layers of interviews ...