Do you know where I can get a DB to practice the SQL commands of the SQL course? The only one I found so far was HR in Oracle Database (human resources) but I failed to find a proper Entity-Relationship model of the DB and reverse-engineering it seems a bit too steep for me. Th...
Learn how first normal form (1NF) can improve your database design by enforcing atomicity in your tables. Marie Fayard January 22, 2025 SQL SQL Subquery: A Comprehensive Guide Discover how to master SQL subqueries to enhance your database queries. Learn about correlated, non-correlated, and rec...
Back To Basics, Part Uno: Linear Regression and Cost Function Data Science An illustrated guide on essential machine learning concepts Shreya Rao February 3, 2023 6 min read Must-Know in Statistics: The Bivariate Normal Projection Explained
The SQL Murder Mystery — This is another one of my favorites thanks to its fun, interactive environment that has you feeling like a top secret agent. Interview Query — This platform is dedicated to helping data scientists practice their SQL. If you’re serious, it’s worth looking into, ...
Data Manipulation in SQL 1 Use Real-World SQL Start Chapter You will review some of the most commonly used SQL commands to ensure you are prepared to tackle both real-world problems as well as every exercise covered in this course.
3、The nobel table can be used to practice more SUM and COUNT functions. 1)Show the total number of prizes awarded. SELECT COUNT(winner) FROM nobel 2)List each subject - just once SELECT DISTINCT subject FROMnobel 3)Show the total number of prizes awarded for Physics. ...
SQL Exercises, Practice, Solution: Retrieve data from tables, display all columns, specific columns, display string, numbers, sum numbers and more
Best practice for loading data into SQL Server When you copy data into SQL Server, you might require different write behavior: Append: My source data has only new records. Upsert: My source data has both inserts and updates. Overwrite: I want to reload the entire dimension table each time....
To practice and understand the steps, you can follow a running example that migrates a sample database to Azure SQL Data Warehouse. To try out the sample, you’ll need: On Azure, an: Azure subscription Azure storage account Azure SQL Data Warehouse database On a local computer: The l...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Sets Transact-SQL and query processing behaviors to be compatible with the specified version of the SQL engine. For other ALTER DATABASE options, see ALTER DATABASE. For more information about the syntax conventions, see ...