# Frequent question: What is decimal data type in SQL Server?

Contents

The Decimal or Numeric data types SQL server represents the numbers that contain the integer part & fractional part separated by a decimal point. The numbers include both negative & positive numbers. Both Decimal & Numeric data types are the same, you can interchange them.

## What is decimal data type in SQL?

Overview of SQL Server DECIMAL Data Type

To store numbers that have fixed precision and scale, you use the DECIMAL data type. … The precision has a range from 1 to 38. The default precision is 38. s is the scale which is the number of decimal digits that will be stored to the right of the decimal point.

## What is 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.

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## What does decimal do in SQL?

Converting decimal and numeric data

In Transact-SQL statements, a constant with a decimal point is automatically converted into a numeric data value, using the minimum precision and scale necessary. For example, the constant 12.345 is converted into a numeric value with a precision of 5 and a scale of 3.

## Which data type is used for decimal numbers in SQL Server?

SQL General Data Types

Data type Description
BIGINT Integer numerical (no decimal). Precision 19
DECIMAL(p,s) Exact numerical, precision p, scale s. Example: decimal(5,2) is a number that has 3 digits before the decimal and 2 digits after the decimal
NUMERIC(p,s) Exact numerical, precision p, scale s. (Same as DECIMAL)

## What are the 5 data types?

Common data types include:

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

## What is number data type?

Numeric data types are numbers stored in database columns. These data types are typically grouped by: Exact numeric types, values where the precision and scale need to be preserved. The exact numeric types are INTEGER , BIGINT , DECIMAL , NUMERIC , NUMBER , and MONEY .

## How many types of decimals are there?

There are two types of Decimals.

## What is the difference between float and decimal?

Float is a single precision (32 bit) floating point data type and decimal is a 128-bit floating point data type. … Decimal accurately represent any number within the precision of the decimal format, whereas Float cannot accurately represent all numbers.

## How does decimal data type work?

Unlike FLOAT, DECIMAL data type has fixed decimal places. … The precision defines the total number of decimal digits to store within the number. This includes digits to the left and right of the decimal. The scale defines the total number of decimal digits to the right of the decimal.

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## How do I get only 2 decimal places in SQL?

Replace your query with the following. Select Convert(Numeric(38, 2), Minutes/60.0) from …. MySQL: Select Convert(Minutes/60.0, Decimal(65, 2)) from ….

## What is meant by a decimal 5 2 )?

Weight Decimal (5,2) means the total number of digits cannot exceed 5 and 2 digits can be placed to the right of the decimal. However, the value 1000.45 in the second line of code above exceeds the specified range of (5, 2) since it means 6 digits in total and throws an overflow error.

## How do I compare two decimal values in SQL?

declare @num1 decimal(18, 0) = 1.98; declare @num2 decimal(18, 0) = 2.2; SQL Server then assigns the values by converting the constants to the appropriate value, and both are being set to “2.”. You need to explicitly set the precision/scale if you want those values to be stored exactly.

## What is difference between decimal and float in SQL?

Decimal data types in Sql Server. Float stores an approximate value and decimal stores an exact value. … In summary, exact values like money should use decimal, and approximate values like scientific measurements should use float.

## What is a varchar data type?

As the name suggests, varchar means character data that is varying. Also known as Variable Character, it is an indeterminate length string data type. It can hold numbers, letters and special characters. … SQL varchar usually holds 1 byte per character and 2 more bytes for the length information.

## Does varchar accept decimal?

The short answer is: No, it will hurt performance. The longer answer: VARCHAR fields are variable length, meaning, that the formatting of the database blocks cannot pre-account for the size of the data filling in there. Hope you bring the right number of decimal places, because in VARCHAR “11.99” != “11.990”.

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