Functions are reusable queries or query parts. Kusto supports several kinds of functions:
- Stored functions are user-defined functions that are stored and managed database schema entities. See Stored functions.
- Query-defined functions are user-defined functions that are defined and used within the scope of a single query. The definition of such functions is done through a let statement. See User-defined functions.
- Built-in functions are hard-coded functions defined by Kusto that cannot be modified by users.
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