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MySQL | TRUNCATE method

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Numeric
schedule Jul 1, 2022
Last updated
local_offer 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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Published by Arthur Yanagisawa
Edited by 0 others
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