SQL$HELP_OLD72.HLB  —  Literals  Numeric Literals
    A numeric literal is a string of digits that SQL interprets as a
    decimal number. A numeric literal can be a:

    o  Decimal string that consists of digits and an optional decimal
       point. The maximum length, not counting the decimal point, is
       19 digits.

    o  Decimal number in scientific notation (E notation) that
       consists of a decimal string mantissa and a signed integer
       exponent, separated by the letter E. You cannot embed spaces
       in E notation.

    The following syntax shows the format of numeric literals:

  numeric-literal =

  --+------+-+-+> <digit> +-+------------------------+-+-+
    +-> + -+ | +----<-----+ +-> . --+------->------+-+ | |
    +-> - -+ |                      +-+> <digit> +-+   | |
             |                        +----<-----+     | |
             +-> . -+> <digit> +-----------------------+ |
                    +----<-----+                         |
   +-----------------------------------------------------+
   ++---------->-----------------+-->
    +-- E -+------+-+> <digit> +-+
           +-> + -+ +----<-----+
           +-> - -+
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