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| May 24, 2025 | » | KQL: Aggregation Functions
6 min; updated May 24, 2025
Aggregation functions allow you to group and combine data from multiple rows into a summary value. contains the database referenced in this document. Use the summarize operator Find the number of events by state. State TotalStorms TEXAS 4,701 KANSAS 3,166 … … StormEvents | summarize TotalStorms = count() by State summarize groups together rows based on the by clause and uses the aggregation function to combine each group into a single row.... |
| May 24, 2025 | » | KQL: Common Operators
4 min; updated May 24, 2025
contains the database referenced in this document. Count rows How many storm records are there in the table? Count 59066 StormEvents | count count returns a table with a single column and a single row containing the count of the remaining rows. The output is not a scalar value. See a sample of data Sample N rows from the StormEvents table.... |
| May 24, 2025 | » | KQL: Overview
2 min; updated May 24, 2025
A Kusto query is a read-only request that processes data that is organized into a hierarchy of databases, tables, and columns, similar to SQL. Query statements are separated by a ;, and only affect the query at hand. There are 3 kinds of user query statements: tabular expression statements, let statements, and set statements. The most common kind is the tabular expression statement where the input and the output consist of tables.... |