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double precision
The term double precision describes a
datatype,
or more precisely a
decimal datatype.
Like all decimal datatypes, the datatype double precision is also based on the
ANSI standard.
The datatype double precision requires 8
bytes of
storage.
Allowed values are decimal numbers. Their range of values is machine dependent.
Usage of the datatype double precision
The datatype double precision is used only if rounded values do not cause problems.
In all other cases, more acurate datatypes should be used, because with decimal datatypes, depending on the method of calculation, the number behind the decimal point could be rounded. For example the
ASE
client application
isql
only displays an accuracy of six digits after the decimal point. The following numbers are accordingly rounded up or down.
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