What is the function of "And" and "Or" in SPL queries within Splunk ES?

The function of "And" and "Or" in SPL (Search Processing Language) queries within Splunk Enterprise Security revolves around defining logical relationships between different search criteria. By using "And," you can specify that multiple conditions must be met for the results to be included in the output, resulting in a more precise dataset. For instance, if you want to find events that match both a specific user and a particular action, using "And" allows you to combine these criteria effectively.

Conversely, using "Or" allows for broader results by indicating that at least one of the specified conditions must be met. This is useful when you want to capture events that fulfill any of several possible criteria.

The combination of these logical operators enables users to craft complex queries that can drill down into the data according to their specific needs, thereby refining search results to better suit their investigation purposes. The correct understanding of these operators is fundamental for performing effective data analysis in Splunk.