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Azure Digital Twins query language reference: Reserved keywords

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This document contains the list of reserved keywords in the Azure Digital Twins query language. These words cannot be used as identifiers in queries unless they are escaped in double square brackets.

List of reserved keywords

Here are the reserved keywords in the Azure Digital Twins query language:

  • ALL
  • AND
  • AS
  • ASC
  • AVG
  • BY
  • COUNT
  • DESC
  • DEVICES_JOBS
  • DEVICES_MODULES
  • DEVICES
  • ENDS_WITH
  • FALSE
  • FROM
  • GROUP
  • IN
  • IS_BOOL
  • IS_DEFINED
  • IS_NULL
  • IS_NUMBER
  • IS_OBJECT
  • IS_PRIMITIVE
  • IS_STRING
  • MAX
  • MIN
  • NOT
  • NOT_IN
  • NULL
  • OR
  • ORDER
  • SELECT
  • STARTS_WITH
  • SUM
  • TOP
  • TRUE
  • WHERE
  • IS_OF_MODEL

Escaping reserved keywords in queries

To use a reserved keyword as an identifier in a query, escape the keyword by enclosing it with double square brackets like this: [[<keyword>]]

For example, consider a set of digital twins with a property called GROUP, which is a reserved keyword. To filter on that property value, the property name must be escaped where it is used in the query, as shown below:

SELECT * FROM DIGITALTWINS WHERE [[Group]] = 'BravoTeam'