# What is a double data type in Access?

## What is a double data type in Access?

They have a precision of up about 7 decimal digits (float) or 15 digits (double). The exponent (location of decimal point) is stored separately, an can range from -45 to +38 (float) or from -324 to 308 (double). Use floating point numbers if you require a large range but only limited precision.

What is a double precision number in Access?

A single precision number has between 6 and 9 significant figures, with 7 as the most common. (For example, if 1,234,567,890 is entered into the field, Access will display 1.234568E+09.) A double precision number can contain 15-17 significant figures.

What is single double in Access?

Single — For numeric floating point values that range from -3.4 x 1038 to +3.4 x 1038 and up to seven significant digits. Storage requirement is four bytes. Double — For numeric floating point values that range from -1.797 x 10308 to +1.797 x 10308 and up to 15 significant digits.

### Why we use double data type?

Double is more precise than float and can store 64 bits, double of the number of bits float can store. Double is more precise and for storing large numbers, we prefer double over float. For example, to store the annual salary of the CEO of a company, double will be a more accurate choice.

How many digits is a double?

15 decimal digits
double is a 64 bit IEEE 754 double precision Floating Point Number (1 bit for the sign, 11 bits for the exponent, and 52* bits for the value), i.e. double has 15 decimal digits of precision.

What are the different number field type in Access?

NUMBER. For Number, the critical distinction is made in the Field Size property: Byte, Integer, Long Integer, Single, Double, Replication ID, and Decimal.

## What is integer data type in Access?

Integer. Numbers from -32,768 to 32,767 (no fractions). None. 2 bytes.

What type of number is a double?

floating-point number
Double (aka double): A 64-bit floating-point number. Decimal (aka decimal): A 128-bit floating-point number with a higher precision and a smaller range than Single or Double.

How do you double data type?

A variable can be declared as double by adding the double keyword as a prefix to it. You majorly used this data type where the decimal digits are 14 or 15 digits. However, one must use it cautiously as it consumes memory storage of 8 bytes and is an expensive method.