An inner join returns only the rows that match the condition in both tables. It is the most common and default type of join in SQL. For example, if you have a table of customers and a table of ...

Key Takeaways Interviews for data analysts test technical and business understanding.Practicing real examples helps you ...

This project was created to practice relational database design, query optimization, and business data analysis using SQL. Ideal for students, data analysts, or developers seeking to understand ...

Catwatchful is spyware masquerading as a child monitoring app that claims to be “invisible and cannot be detected,” all the while uploading the victim’s phone’s private contents to a dashboard ...

Performance of large join queries has been widely addressed in the database literature, explicitly the problem of finding a join order that minimizes the execution cost of a given query has been ...

This project showcases 10 SQL queries based on multi-table joins between departments, employees, and projects. Includes INNER JOIN, LEFT JOIN, and subqueries to analyze relationships and missing links ...