Literals Describes the syntax of literals (constant values) to be used in sources. Integer literalsInteger literals define a whole number in an expression.Numeric literalsNumeric literals define values with a decimal part in an expression.Text literalsText literals define a character string in an expression.MDY(m,d,y) literalsMDY() literals define a DATE literal in an expression.Datetime literalsDatetime literals define date/time value in an expression.Interval literalsInterval literals define an interval value in an expression.