3. You have got a request to execute a query which is an “Update” query. That update is updating 5 million rows, after an hour it’s still executing and you are getting lot of requests from report users that their things are getting slow down. What’s your action plan? 4. See I...
SQL Interview Questions for Experienced and Developers SQL Joins Interview Questions SQL Server Interview Questions PostgreSQL Interview Questions Interview Query Resource:Top 25+ Data Science SQL Interview Questions by Interview Query This interview guide will cover SQL interview questions you need to prepar...
Query Processing Architecture Q. I have submitted a Query to SQL Server from an Application and I got the reply as “data inserted successfully”. Can you demonstrate what the processing done inside? Ans: When you submit a query to a SQL Server database, a number of processes on the serve...
Learn how to query your Pandas DataFrames using the standard SQL SELECT statement, seamlessly from within your Python code. SQLSQL Interview Questions for Experienced Professionals - Jan 7, 2022. This article will show you what SQL concepts you should know as an experienced professional. SQLKD...
“I’m doing this for a number of years now, and working with SQL Server is what I do. You just started, and wrote your first query a few months ago. If you find any resources that show me being wrong, I’ll be happy to quit my job. Until then, please don’t explain T-SQL ...
To answer this question, it’s helpful to first ask “What is SQL?” SQL, which stands for Structured Query Language, is used to query and manage data on relational databases. It’s a standard language that can be used in several distinct database systems. MySQL is an example of a rela...
Most Commonly Asked Interview Question Q:What is a Common Table Expression (CTE) in SQL Server? A:A Common Table Expression (CTE) is a temporary named result set that can be used within a SELECT, INSERT, UPDATE, DELETE, or CREATE VIEW statement. It acts as a named subquery and allows...
Also, do not forget to read the limitations to Connect to SQL Server database from Power Query Online here. Thank you for reading!1 Comment T-SQL Tuesday #174: My Favorite Job Interview QuestionMay 14, 2024, posted in T-SQL Tuesday ...
Most Commonly Asked Interview Question Q: What is an Index in SQL Server and how does it improve performance? A: An Index in SQL Server is a data structure that helps SQL Server quickly locate the data that is requested in a query. The data in an index is organized in such a way ...
When needed, stick to very simple, indexed joins (typically left join from table A to B)\r\n Every query should refer do a particular item id, eg. ... where user_id = 1 2 3 4 or similar.\r\n\r\n\r\nI get incredibly suspicious any time I see any queries in a backend syste...