If a variable name in a syntax element is a Teradata reserved keyword, starts with a digit, or contains any nonalphanumeric character except underscore (_), you must surround it with double quotation marks in syntax elements.
If a variable name in a syntax element is a Teradata reserved keyword, starts with a digit, or contains any nonalphanumeric character except underscore (_), you must surround it with double quotation marks in syntax elements.