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# MySQL | TRUNCATE method

schedule Aug 12, 2023
Last updated
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MySQL
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MySQL's `TRUNCATE(~)` method returns the input number truncated to `D` decimal places.

NOTE

Truncation is not the same as rounding. Truncation will simply cut off anything after `D` decimal places without performing rounding.

# Parameters

1. `X` | `number`

The number to truncate.

2. `D` | `number`

The number of decimal places to truncate to.

# Return value

The input number truncated to `D` decimal places.

# Examples

## Basic usage

To truncate to `1` decimal place:

``` SELECT TRUNCATE(5.55, 1); +-------------------+| TRUNCATE(5.55, 1) |+-------------------+| 5.5 |+-------------------+ ```

Note that we simply get rid of the second decimal place rather than rounding to the nearest tenth to `5.6`.

To truncate to zero decimal places:

``` SELECT TRUNCATE(567.52, 0); +---------------------+| TRUNCATE(567.52, 0) |+---------------------+| 567 |+---------------------+ ```

## Negative decimal places

To truncate to hundreds:

``` SELECT TRUNCATE(567.52, -2); +----------------------+| TRUNCATE(567.52, -2) |+----------------------+| 500 |+----------------------+ ```

Note that everything starting two places left of the decimal point (i.e. tens column) is replaced with zero leaving only the hundreds column untouched.

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