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