Answer / anil kumar karasi

Lexical parameter is a condition (where clause) given at
runtime to generate the report on that condition. The '&'
symbol will preceed the where clause condition.

Answer / deepak muduli

Lexical parameters can dynamically replace clauses in the
Select statement in the data model and even the whole
select statement. It replaces any part of a SELECT
statement, such as column names, the FROM clause, the WHERE
clause, the ORDER BY clause. To create a lexical reference
in a query, prefix the parameter name with an ampersand (&)

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