How to use Pass Through SQL in Report Studio

If you place curly braces ({}) around your SQL statement in a Tabular SQL object, that SQL statment will be sent directly to the database. Note that no validity checking is done on the SQL, so the report author is fully responsible for the correct operation of the SQL statement.
Steps:
Create a Tabular SQL object.
Write you SQL statement. Ensure that it is surround by curly braces. For example, if your SQL statement isSELECT * FROM ORDER_HEADERyou need to write it as:
{SELECT * FROM ORDER_HEADER}