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# How do you know what data type to use?

## How do you know what data type to use?

That means you should try to adhere to the following rules:

1. If the data is numeric, favor SMALLINT, INTEGER, BIGINT, or DECIMAL data types.
2. If the data is character, use CHAR or VARCHAR data types.
3. If the data is date and time, use DATE, TIME, and TIMESTAMP data types.

## What data type is a decimal?

The decimal data type is an exact numeric data type defined by its precision (total number of digits) and scale (number of digits to the right of the decimal point).

Which data type is this?

data type

Data Type Used for Example
Integer Whole numbers 7, 12, 999
Float (floating point) Number with a decimal point 3.15, 9.06, 00.13
Character Encoding text numerically 97 (in ASCII, 97 is a lower case ‘a’)
Boolean Representing logical values TRUE, FALSE

### What data type should I use for price?

The best type for price column should be DECIMAL. The type DECIMAL stores the value precisely. For Example – DECIMAL(10,2) can be used to store price value. It means the total digit will be 10 and two digits will be after decimal point.

### How do you write decimal data type?

The Basic syntax of Decimal data type in SQL Server

1. p stands for Precision, the total number of digits in the value, i.e. on both sides of the decimal point.
2. s stands for Scale, number of digits after the decimal point.

Can Smallint have decimals?

Choose SMALLINT when you need exact numeric integers from -32,768 to 32,767. It uses 2 bytes of storage and has four digits of decimal precision. It is fast at running integer calculations.

#### What are the 4 data types?

Common data types include:

• Integer.
• Floating-point number.
• Character.
• String.
• Boolean.

#### What numeric data type is best used for prices or financial values?

Using DECIMAL(10,2) usually is enough but if you need a little bit more precise values you can set DECIMAL(10,4) . If you work with big values replace 10 with 19 .

What numeric data type is best used for prices of financial values?

Decimal data type
The Decimal data type provides the greatest number of significant digits for a number. It supports up to 29 significant digits and can represent values in excess of 7.9228 x 10^28. It is particularly suitable for calculations, such as financial, that require a large number of digits but cannot tolerate rounding errors.

## How many numbers can a double data type store?

The double data type can store fractional numbers from 1.7e−308 to 1.7e+308. Note that you should end the value with a “d”: Note that you should end the value with a “d”: Example

## Which is the best data type to store whole numbers?

The int data type can store whole numbers from -2147483648 to 2147483647. In general, and in our tutorial, the int data type is the preferred data type when we create variables with a numeric value. The long data type can store whole numbers from -9223372036854775808 to 9223372036854775807.

Which is the best data type for access?

When creating tables in Access, you need to select a data type for each column of data. The Short Text data type is a popular choice since it lets you enter almost any character (letter, symbol, or number).

### Which is an example of a field’s data type?

Think of a field’s data type as a set of qualities that applies to all the values that are contained in the field. For example, values that are stored in a Text field can contain only letters, numbers, and a limited set of punctuation characters, and a Text field can only contain a maximum of 255 characters.