Double Precision Real
type: RealDoublePrecisionType
description: A double precision floating point datatype. Numbers of this type are stored using 64 bits, they require more memory than numbers of type single, which use 32 bits. However, because they are stored with more bits, numbers of type double are represented to more precision than numbers of type single. The double-precision (or double) data type is represented according to IEEE Standard 754 for double precision. A value is formatted with bit-fields for sign, mantissa and exponent.
code: 405
literal: double
was influenced by: floating-point-types.html
was influenced by: datatypes.html
was influenced by: Floating point
was influenced by: IEEE floating point
was influenced by: http://msdn.microsoft.com/en-us/library/aa275635(v=sql.80).aspx
was influenced by: floating-point-numbers.html
abbreviation: F64
ansi SQL name: DOUPLE PRECISION
base: 2
bits: 64
bytes: 8
encoding: DoublePrecisionEncoding
exact match: FLOAT IEEE754-BINARY64
id: T006-03
java name: double
js name: double
matlab name: double
max exclusive: (1-2^{-53}) \times 2^{1024}
max exponent: 1023
max mantissa: 9007199254740991
microsoft SQL server name: float
min exclusive: -(1-2^{-53}) \times 2^{1024}
min mantissa: -9007199254740991
my SQL name: DOUBLE
odbc name: SQL_DOUBLE
ole DB name: DBTYPE_R8
oracle SQL name: FLOAT(49)
rdfs datatype: double