List of expression elements This topic is the reference for language expressions. Comparison operatorsComparison operators allow you to compare two values, to include the greater than, less than and equal to functions.Boolean operatorsBoolean operators include NOT, AND and OR.Arithmetic operatorsArithmetic operators allow you to complete numeric operations, such as addition and subtraction.Character string operatorsCharacter string operators allow you to work with and manipulate character strings.Associative syntax operatorsAssociative syntax operators allow you to group together objects.SQL related operatorsSQL related operators allow you to retrieve the SQL state and the SQL error message.Data type operatorsData type operators allow you cast a data type or create an instance of a data type.Assignment operatorsAn assignment operator allows you to assign a variable with an expression.Date and time operatorsDate and time operators allow you to work with date and time values.Dialog handling operatorsDialog handling operators allow you to handle variables in a DIALOG statement.