KQL Query Helper-KQL query builder and optimizer.

Example

A user wants to understand how the `where` operator works in KQL. The KQL Query Helper provides a detailed explanation: ```kql SecurityEvent | where Computer == "contosohotels.com" ``` This filters the SecurityEvent table to include only rows where the Computer column matches the specified value.

Scenario

A security analyst needs to filter security events based on a specific computer name to investigate suspicious activities in their network.

Example

A user needs a query to count the number of sign-ins per application over the last week: ```kql SigninLogs | where TimeGenerated > ago(7d) | summarize SigninCount=count() by AppDisplayName | sort by SigninCount desc ``` This query retrieves sign-in logs from the past week, counts the number of sign-ins per application, and sorts the results in descending order.

Scenario

A system administrator wants to identify the most used applications in their organization over the past week for resource allocation and monitoring purposes.

Example

A user wants to optimize their KQL query for better performance. The KQL Query Helper suggests placing time filters early in the query to reduce the amount of data processed: ```kql SigninLogs | where TimeGenerated > ago(30d) | where UserPrincipalName == "[email protected]" | project TimeGenerated, IPAddress ``` This approach ensures that only relevant data within the last 30 days is considered before applying further filters.

Scenario

A data engineer needs to optimize a query that analyzes user sign-in data over a large time period to improve query performance and reduce processing time.