What is a standard shared lock in database systems?

Can you explain what a standard shared lock is in database systems?

A standard shared lock allows multiple transactions to read a resource simultaneously, but prevents any from modifying it.

How does it differ from an exclusive lock?

An exclusive lock prevents any other transaction from accessing the resource, while a shared lock allows concurrent reads.

When would I use a shared lock instead of an exclusive lock?

You would use a shared lock when you need to read data without altering it, allowing other transactions to read as well.

Can you give an example of a situation where a shared lock is beneficial?

Sure! In a reporting scenario, multiple users can read data for analysis without interfering with each other's access.