Not just in code, anywhere that accepts a comment (or carries a JSON Schema), e.g.

  # just as an example, I'm pretty sure that
  # IJ already knows this is SQL
  spring:
    datasource:
      hikari:
        # language=sql
        connection-test-query:
          SELECT count(1) FROM my_table

and also in not-obviously-sql literals

  #!/usr/bin/env python
  # language=sql
  MY_AWESOME_QUERY = """
  WITH awesome AS (
  -- ...
  ) SELECT * FROM awesome
  """