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show tables command returns a list of all tables in the current database.įor more information on management commands, see Management commands overview. show, are used to display metadata or data. The large class of commands that start with. Not all management commands modify data or metadata. This distinction prevents many kinds of security attacks, simply because it prevents embedding management commands inside queries. In particular, management commands are distinguished from queries by having the first character in the text of the command be the dot (. Management commands have their own syntax, which isn't part of the Kusto Query Language syntax, although the two share many concepts. create table Logs (Level:string, Text:string) For example, the following management command creates a new Kusto table with two columns, Level and Text. In contrast to Kusto queries, Management commands are requests to Kusto to process or modify data or metadata. To try out some more Kusto queries, see Tutorial: Write Kusto queries.

In the last line, the query returns a table with a single column and a single row containing the count of the remaining rows. The data rows for the source table are filtered by the value of the StartTime column and then filtered by the value of the State column. The statement begins with a reference to a table called StormEvents and contains several operators, where and count, each separated by a pipe. This query has a single tabular expression statement. KQL is case-sensitive for everything – table names, table column names, operators, functions, and so on.

There are three kinds of user query statements:Īll query statements are separated by a (semicolon), and only affect the query at hand. Kusto queries are made of one or more query statements. The request is stated in plain text, using a data-flow model that is easy to read, author, and automate. What is a Kusto query?Ī Kusto query is a read-only request to process data and return results. To learn how to use KQL, see Tutorial: Learn common operators. To access the query environment, use the Azure Data Explorer web UI. This article provides an explanation of the query language and offers practical exercises to get you started writing queries.

The query uses schema entities that are organized in a hierarchy similar to SQLs: databases, tables, and columns. Kusto Query Language (KQL) is a powerful tool to explore your data and discover patterns, identify anomalies and outliers, create statistical modeling, and more.

Starting out with java pdf download free