Can you explain the difference between a clustered and a non-clustered index?
A clustered index determines how data is physically stored in a table, while a non-clustered index is a separate structure that points to the data.
Home » Interview Questions »
Interview Questions
Can you explain the concept of a self-JOIN and provide an example where it might be useful?
In SQL (Structured Query Language), a JOIN operation combines rows from two or more tables based on a related column between them. A self-JOIN is a type of JOIN where a table is joined with itself. Essentially, it’s when you… Read More »Can you explain the concept of a self-JOIN and provide an example where it might be useful?
What is CAP theorem in the context of databases, and how does it apply to NoSQL databases?
The CAP theorem, also known as Brewer’s theorem, is a concept in distributed database systems that states it is impossible for a distributed data store to simultaneously provide more than two out of the following three guarantees: In other words,… Read More »What is CAP theorem in the context of databases, and how does it apply to NoSQL databases?
What is the concept of partitioning in databases and its advantages?
Partitioning a database entails splitting a large database into more manageable, smaller segments known as partitions. This segmentation is performed based on several strategies such as range, list, hash, and composite partitioning, each dictating the way data is divided. Let’s… Read More »What is the concept of partitioning in databases and its advantages?
How to optimize a database for large-scale, high-transaction environment
Optimizing a database for a large-scale, high-transaction environment involves several strategies: Remember, each database and use case is unique, so these strategies should be applied as appropriate for your specific situation. It’s also a good idea to thoroughly test any… Read More »How to optimize a database for large-scale, high-transaction environment