For example, the following control command creates a new Kusto table with two columns, Level and Text. In contrast to Kusto queries, Control commands are requests to Kusto to process or modify data or metadata. To try out some more Kusto queries, see Tutorial: Use 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 РІР‚вЂњ table names, table column names, operators, functions, and so on. At the end of the funnel, you're left with a refined output. Because the piping of information from one operator to another is sequential, the query operator order is important and can affect both results and performance. Each time the data passes through another operator, it is filtered, rearranged, or summarized. It's like a funnel, where you start out with an entire data table. The data is filtered or manipulated at each step and then fed into the following step. Data flows, or is piped, from one operator to the next. Tabular statements contain zero or more operators, each of which starts with a tabular input and returns a tabular output. The most common kind of query statement is a tabular expression statement, which means both its input and output consist of tables or tabular datasets. For information about application query statements, see Application query statements.

Pipe flow expert 4.6 2007