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When analyzing telemetry and logs in Azure, engineers query data stored within Azure Data Explorer using the Kusto Query Language (KQL). The Azure Data Explorer web UI provides a powerful query editor designed to streamline query creation, offering real-time assistance through features like autocomplete and inline troubleshooting. This environment accelerates the process of identifying system anomalies and verifying resource health during DevOps operations.
The query editor includes KQL Intellisense to provide contextual recommendations as you write queries. This assistant suggests functions, operators, and database tables, allowing you to build queries quickly without memorizing exact syntax. When typing in the editor, users can interact with these features through a structured workflow:
To minimize context-switching, the query editor displays documentation directly inside the interface. Users can hover over any operator or function and click the right arrow icon to open an inline preview of the official documentation, which remains visible until manually closed. Additionally, when the editor detects warnings or suboptimal code, it suggests automated quick fix options. To apply a quick fix, hover over the flagged term, select the Quick Fix menu, and choose the desired optimization, such as converting inline functions or extracting values into variables.
The KQL tools menu in the editor toolbar provides essential management features for organizing your workspace. From this menu, users can duplicate existing queries, trigger the command palette, or link out to comprehensive external learning resources. These tools help manage query versions and settings without disrupting the troubleshooting flow.
Querying log data effectively relies on chaining together specific KQL operators that transform raw inputs into structured insights. Data flows from the source table through these operators in a pipeline, where each step modifies the dataset before passing it to the next. The primary operators used to shape this data include:
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