The first step to understanding queries with Azure Resource Graph is a basic understanding of the Query Language. If you aren't already familiar with Kusto Query Language KQLit's recommended to review the tutorial for KQL to understand how to compose requests for the resources you're looking for.

If you don't have an Azure subscription, create a free account before you begin. Before running any of the following queries, check that your environment is ready. This query returns number of Azure resources that exist in the subscriptions that you have access to.

It's also a good query to validate your shell of choice has the appropriate Azure Resource Graph components installed and in working order. Try this query in Azure Resource Graph Explorer:. This query uses count instead of summarize to count the number of records returned. Only key vaults are included in the count.

This query returns any type of resource, but only the nametypeand location properties. It uses order by to sort the properties by the name property in ascending asc order. To list only virtual machines which are type Microsoft. Similar to the previous query, desc changes the order by to be descending. This query will use top to only retrieve five matching records that are ordered by name.

The type of the Azure resource is Microsoft.

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Building on the previous query, we're still limiting by Azure resources of type Microsoft. Instead, we used summarize and count to define how to group and aggregate the values by property, which in this example is properties.

For an example of how this string looks in the full object, see explore resources - virtual machine discovery. A different way to write the same query is to extend a property and give it a temporary name for use within the query, in this case os. If the property is the incorrect case, a null or incorrect value is returned and the grouping or summarization would be incorrect. Instead of explicitly defining the type to match, this example query will find any Azure resource that contains the word storage.We already created the environment in the previous section, and now, we will extend our knowledge by first creating the table in the explorer database, and then import the data in the table from an external source.

This is technically called data ingestion. We will then try to build queries to discover patterns, identify anomalies and outliers, create statistical modeling, and so on and so forth. As an end result, you should get your data validated by SMEs or stakeholders. This is where you would wish to share the data. We will export the data in excel to share.

Finally, after the data has been validated, the visualized data needs to be presented. As a result, we will try to present the output as a Power BI dashboard.

Interestingly the KQL is a read-only query language, which processes the data and returns results. It is very similar to SQL with a sequence of statements, where the statements are modeled as a flow of tabular data output from the previous statement to the next statement. These statements are concatenated with a pipe character.

We will see how this works shortly. KQL is also capable of working with the streaming data as well, but we need to raise a support ticket to get it enabled. By default, it is not enabled. The Kusto Query Language uses the Kusto Engine to query big data sets for analytics, and specifically the large datasets from Azure, like —. Apart from these, the data can be ingested from external sources as well.

It can be from custom code in any preferred language like Python. Net SDK, R, etc. So we can divide the data ingestion.

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It allows data ingestion from disparate sources. These ingestions can be divided into three categories, which are —. Allowing a huge spectrum of data sources for ingesting data. Now, what is data ingestion? It is the process to load the data into the database tables from different sources. One thing to keep in mind is that there are certain limitations on the file size for data ingestion.

There are certain demo platforms that are provided by Microsoft, which can be used free of cost for practice purposes. They are for —. These platforms also have saved queries that can be used to get an insight into how queries are formed and complex queries can be built. You can save your queries as well. There is a dedicated course by Robert Cain on the Kusto Query Language on Pluralsight, which gives you deeper insight into KQL and that course is highly recommended for you as a data scientist as it details out the different kinds of commands and capabilities of KQL.

Part — 1: Data Science Overview.The query language for the Azure Resource Graph supports a number of operators and functions.

Resource Graph provides several tables for the data it stores about Resource Manager resource types and their properties. These tables can be used with join or union operators to get properties from related resource types. Here is the list of tables available in Resource Graph:. For a complete list including resource types, see Reference: Supported tables and resource types. Resources is the default table.

While querying the Resources table, it isn't required to provide the table name unless join or union are used. However, the recommended practice is to always include the initial table in the query. Use Resource Graph Explorer in the portal to discover what resource types are available in each table. The following query shows a simple join. The query result blends the columns together and any duplicate column names from the joined table, ResourceContainers in this example, are appended with 1.

As ResourceContainers table has types for both subscriptions and resource groups, either type might be used to join to the resource from resources table. The following query shows a more complex use of join. The query limits the joined table to subscriptions resources and with project to include only the original field subscriptionId and the name field renamed to SubName.

Azure Monitor log query examples

The field rename avoids join adding it as name1 since the field already exists in Resources. The original table is filtered with where and the following project includes columns from both tables. The query result is a single key vault displaying type, the name of the key vault, and the name of the subscription it's in. When limiting the join results with projectthe property used by join to relate the two tables, subscriptionId in the above example, must be included in project.

Recon your Azure resources with Kusto Query Language (KQL)

Resource Graph supports all KQL data typesscalar functionsscalar operatorsand aggregation functions. Specific tabular operators are supported by Resource Graph, some of which have different behaviors. Some property names, such as those that include a. The escape character used depends on the shell Resource Graph is run from.

You may also leave feedback directly on GitHub.

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Skip to main content. Exit focus mode. Learn at your own pace. See training modules. Dismiss alert. This article covers the language components supported by Resource Graph: Resource Graph tables Supported KQL language elements Escape characters Resource Graph tables Resource Graph provides several tables for the data it stores about Resource Manager resource types and their properties.

Here is the list of tables available in Resource Graph: Resource Graph tables Description Resources The default table if none defined in the query. Most Resource Manager resource types and properties are here. ResourceContainers Includes subscription in preview -- Microsoft.

AdvisorResources Includes resources related to Microsoft.This becomes even more interesting as Azure Data Explorer and its documentation is an excellent place to educate yourself on the Kusto Query Language. Perform ad-hoc queries on terabytes of data with Azure Data Explorer—a lightning-fast indexing and querying service to help you build near real-time and complex analytics solutions.

Azure Data Explorer allows you to quickly identify trends, patterns, or anomalies in all data types inclusive of structured, semi structured and unstructured data. There's also a 4-hour Pluralsight course which will really jump start you on KQL. Queries generally begin by either referencing a table or a function.

kql query azure

You start with that tabular data and then run it through a set of statements connected by pipes to shape your data into the final result. So if you start with TableA and you want to only keep events that have a certain key,you would use:.

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Extend adds a new field and project can either choose from the existing set of fields or add a new field. These two statements produce the same result:. The summarize operator can perform aggregations on your dataset. For example, the count operator mentioned above is short for:.

The bin function is often used in conjunction with summarize statements. It lets you group times or numbers into buckets. You technically don't have to specify a join kind but I recommend that you always do. It makes for easier readability and the default probably isn't what you expect.

Note that joins are only on equality and generally it's expected that the keys have the same name on both sides. If they aren't the same, you can use a project statement to make them the same or use an alternate key specification syntax:.

There are some handy functions to get used to like "now " which gives the current UTC time and "ago ". The ago function is especially handy when you're looking for recent data. Imagine that you have a bunch of entities and each one sends a row to your table periodically.

You want to run a query over the latest message from each entity. Use these functions with care though. If they are used on a huge table and the cardinality of the grouping is high, it can destroy performance. You can read the documentation to learn about the various types, but since I deal with a lot of time series data, the one I use the most is timechart. It's a line chart where the x-axis is a datetime and everything else goes on the y-axis.

It automatically keeps the x-axis spaced nicely even if your data doesn't have every time specified. So by using Azure Notebooks you can get quickly up to speed on Kusto Query Language and create some replicable notebooks and resources. Skip to main content.Exploring data is like solving a puzzle.

kql query azure

You create queries and receive instant satisfaction when you discover insights, just like adding pieces to complete a puzzle. Imagine you have to repeat the same analysis multiple times, use libraries from an open-source community, share your steps and output with others, and save your work as an artifact.

Notebooks helps you create one place to write your queries, add documentation, and save your work as output in a reusable format. Jupyter Notebook allows you to create and share documents that contain live code, equations, visualizations, and explanatory text. Its includes data cleaning and transformation, numerical simulation, statistical modeling, and machine learning.

Free course on the Log Analytics query language (KQL) now available

We are excited to announce KQL magic commands which extends the functionality of the Python kernel in Jupyter Notebook. In the following example we run a multi-line query and render a pie chart using the ploy. If you are a Python user, you can place the result set into a pandas dataframe. Our exciting capabilities will allow you to have fun with your data analytics.

Blog Big Data. Common use cases Data science : Data scientists use KQL magic to analyze and visualize data from Azure Data Explorer, easily interchange Python code with KQL queries to experiment, train, score machine learning models, and also save notebooks as artifacts.

Data analytics : Use KQL magic to query, analyze, and visualize data, with no Python knowledge needed. For Python users, easily query data from Azure Data Explorer and use various open-source libraries from the Python ecosystem.

Business reviews : Use KQL magic for business and product reviews. Create the notebook once and refresh with new values every time you use it. Incident response : Use KQL magic to create operational documents, chain-up your queries for easy investigation, save the notebook for reproducibility and artifacts for remote connectivity analyzer RCA.

Security analytics : Query data from Azure Data Explorer and use the rich Python ecosystem for security analytics to analyze and visualize your data.

kql query azure

For example, one of the internal Microsoft security teams uses KQL magic with Juypter for standard analysis patterns to triage security alerts, they have been transforming incident response playbooks into parameterized Jupyter Notebooks to automate repetitive investigation workflows. Getting started Our exciting capabilities will allow you to have fun with your data analytics.You can work through this exercise in your own environment if you are collecting data from at least one virtual machine.

If not then use our Demo environmentwhich includes plenty of sample data. Queries can start with either a table name or the search command.

You should start with a table name, since it defines a clear scope for the query and improves both query performance and relevance of the results. The Kusto query language used by Azure Monitor is case-sensitive. Language keywords are typically written in lower-case. When using names of tables or columns in a query, make sure to use the correct case, as shown on the schema pane.

Azure Monitor organizes log data in tables, each composed of multiple columns. All tables and columns are shown on the schema pane in Log Analytics in the Analytics portal.

Identify a table that you're interested in and then take a look at a bit of data:. The query shown above returns 10 results from the SecurityEvent table, in no specific order. This is a very common way to take a glance at a table and understand its structure and content. Let's examine how it's built:. We could actually run the query even without adding take 10 - that would still be valid, but it could return up to 10, results.

Search queries are less structured, and generally more suited for finding records that include a specific value in any of their columns:. This query searches the SecurityEvent table for records that contain the phrase "Cryptographic". Of those records, 10 records will be returned and displayed. If we omit the in SecurityEvent part and just run search "Cryptographic"the search will go over all tables, which would take longer and be less efficient. Search queries are typically slower than table-based queries because they have to process more data.

While take is useful to get a few records, the results are selected and displayed in no particular order. To get an ordered view, you could sort by the preferred column:. That could return too many results though and might also take some time. The above query sorts the entire SecurityEvent table by the TimeGenerated column. The Analytics portal then limits the display to show only 10, records.

This approach is of course not optimal. The best way to get only the latest 10 records is to use topwhich sorts the entire table on the server side and then returns the top records:. Descending is the default sorting order, so we typically omit the desc argument. The output will look like this:.

Filters, as indicated by their name, filter the data by a specific condition. This is the most common way to limit query results to relevant information. To add a filter to a query, use the where operator followed by one or more conditions.

For example, the following query returns only SecurityEvent records where Level equals 8 :. Values can have different types, so you might need to cast them to perform comparison on the correct type. This is the default time range applied to all queries. To get only records from the last hour, select Last hour and run the query again. You can also define your own time range by adding a time filter to the query. In the above time filter ago 30m means "30 minutes ago" so this query only returns records from the last 30 minutes.

Other units of time include days 2dminutes 25mand seconds 10s. You can also use project to rename columns and define new ones.This article includes various examples of queries using the Kusto query language to retrieve different types of log data from Azure Monitor.

Different methods are used to consolidate and analyze data, so you can use these samples to identify different strategies that you might use for your own requirements. See the Kusto language reference for details on the different keywords used in these samples.

kql query azure

Go through a lesson on creating queries if you're new to Azure Monitor. This example searches the Events table for records in which EventLog is Application and RenderedDescription contains cryptographic. Includes records from the last 24 hours.

Search tables Event and SecurityEvents for records that mention unmarshaling.

Understanding the Azure Resource Graph query language

The following example finds computers that were active in the last day but did not send heartbeats in the last hour. This example finds related protection status records and heartbeat records, matched on both Computer and time.

Note the time field is rounded to the nearest minute. Calculate server availability rate based on heartbeat records. Availability is defined as "at least 1 heartbeat per hour".

The following example collects all records of all tables from the last five hours and counts how many records were in each table. The results are shown in a timechart. The following example searches everything reported in the last hour and counts the records of each table by Type. The results are displayed in a bar chart. This example correlates a particular computer's perf records and creates two time charts, the average CPU and maximum memory.

This example calculates and charts the CPU utilization of computers that start with Contoso. This example lists computers that had a protection status of Not Reporting and the duration they were in this status. This example finds related protection status records and heartbeat records matched on both Computer and time. The time field is rounded to the nearest minute using bin. It parses the Activity value into two new columns, and counts the occurrence of each activityID.

This example shows the number of securityEvent records, in which the Activity column contains the whole term Permissions. The query applies to records created over the last 30 minutes.

This example finds and counts accounts that failed to log in from computers on which we identify a security detection.


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