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## What data type is real?

A ‘Real’ data type is **numerical data which contains decimal numbers**. It would be used when extra detail is required and a whole number would not provide enough information.

## What is the difference between real and double?

FLOAT data type is used to store single-precision and double-precision floating-point numbers. A single-precision floating-point number is a 32-bit approximation of a real number. A double-precision floating-point number is a 64-bit approximation of a real number. …

## What is numeric SQL?

In SQL, numbers are defined as **either exact or approximate**. The exact numeric data types are SMALLINT , INTEGER , BIGINT , NUMERIC(p,s) , and DECIMAL(p,s) . Exact SQL numeric data type means that the value is stored as a literal representation of the number’s value.

## What are 4 types of data?

**4 Types of Data: Nominal, Ordinal, Discrete, Continuous**

- These are usually extracted from audio, images, or text medium. …
- The key thing is that there can be an infinite number of values a feature can take. …
- The numerical values which fall under are integers or whole numbers are placed under this category.

## What are the 5 data types?

Most modern computer languages recognize five basic categories of data types: **Integral, Floating Point, Character, Character String, and composite types**, with various specific subtypes defined within each broad category.

## What is a double vs float?

**A double is 64 and single precision (float) is 32 bits**. The double has a bigger mantissa (the integer bits of the real number). Any inaccuracies will be smaller in the double.

## What does Int 4 mean in MySQL?

For example, INT(4) specifies **an INT with a display width of four digits**. This optional display width may be used by applications to display integer values having a width less than the width specified for the column by left-padding them with spaces.

## Is string is a data type?

A string is **generally considered a data type** and is often implemented as an array data structure of bytes (or words) that stores a sequence of elements, typically characters, using some character encoding.

## What is varchar in MySQL?

Varchar in MySQL is **a data type used for storing text whose length can have a maximum of 65535 characters**. The varchar columns in the table are of variable length string that can hold either numeric or character or both.