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## Why round () is used in SQL?

This function is used **to round off a specified number to a specified decimal places**. This function accepts only all type of numbers i.e., positive, negative, zero. This function accepts fraction numbers.

## How do you round a number in SQL?

In SQL, you round up to the **nearest integer using the CEIL or CEILING function**, depending on whether you’re using SQL Server, Oracle, MySQL or PostgreSQL.

## How do you round to 2 decimal places in SQL Server?

Select Convert(Numeric(38, 2), Minutes/60.0) from …. MySQL: Select Convert(Minutes/60.0, Decimal(65, 2)) from …. The Cast function is a wrapper for the Convert function.

## What is round in database?

The ROUND() function is **used to round a numeric field to the number of decimals specified**. Note: Many database systems do rounding differently than you might expect. … 5 is rounded to the nearest even integer. So, both 11.5 and 12.5 would be rounded to 12.

## What is round in SQL?

In SQL Server (Transact-SQL), the ROUND function **returns a number rounded to a certain number of decimal places**.

## What is Substr SQL?

SUBSTR: Extracting a Substring From a String Value (SQL)

The SUBSTR function **returns a substring of a character value**. You specify the start position of the substring within the value. … If the specified length value is longer than the input string, the result is the full input string.

## How do I round a column in SQL?

If you’d like to round a floating-point number to a specific number of decimal places in SQL, **use the ROUND function**. The first argument of this function is the column whose values you want to round; the second argument is optional and denotes the number of places to which you want to round.

## How do I round up in Oracle SQL?

**Oracle ROUND() function**

- If no integer is defined, then n is rounded to zero places.
- If the integer specified is negative, then n is rounded off to the left of the decimal point.
- If n is positive, then : ROUND(n, integer) = FLOOR(n * POWER(10, integer) + 0.5) * POWER(10, -integer)

## How do I round up in MySQL?

You can **use ceil (ceiling)**. It only rounds up, so you’ll have to multiply with 10000, do the ceil and then divide the result again.

## How do you round to 2 decimal places?

**Rounding to decimal places**

- look at the first digit after the decimal point if rounding to one decimal place or the second digit for two decimal places.
- draw a vertical line to the right of the place value digit that is required.
- look at the next digit.
- if it’s 5 or more, increase the previous digit by one.

## How do I reduce decimal places in SQL?

The SQL AVG() function returns the average value with default decimal places. The **CAST()** is used to increase or decrease the decimal places of a value. The CAST() function is much better at preserving the decimal places when converting decimal and numeric data types.

## How do you set decimal places in SQL?

Generally you can define the precision of a number in SQL by defining it with parameters. For most cases this will be NUMERIC(10,2) or Decimal(10,2) – will define a column as a Number with 10 total digits with a precision of 2 (decimal places). It can also be declared as DECIMAL(10, 2).

## What is cast in SQL?

The SQL CAST function **converts the data type of an expression to the specified data type**. CAST can convert the data type of expr when that data type is a standard data type or a subclass of a standard data type such as %Library. String , %Library.

## What is Floor in SQL?

In SQL Server (Transact-SQL), the FLOOR function **returns the largest integer value that is equal to or less than a number**.