-- (Comment) (DMX)
Indicates a text string that Analysis Services should not execute. You can nest comments within a Data Mining Extensions (DMX) statement, include them at the end of a line of code, or insert them on a separate line.
Use this operator for single-line or nested comments. Comments that are inserted by using -- are delimited by the newline character.
There is no maximum length for comments.
For more information about how to use different kinds of comments in DMX, see Comments (DMX).