ROUND(X), ROUND(X,D) rounds the argument X to D decimal places. : ROUND « Math Numeric Functions « MySQL Tutorial

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MySQL Tutorial » Math Numeric Functions » ROUND

21. 31. 1. ROUND(X), ROUND(X,D) rounds the argument X to D decimal places.

D defaults to 0 if not specified.
D can be negative to cause D digits left of the decimal point of the value X to become zero.


mysql>

mysql> SELECT ROUND(-1.23);

+--------------+

| ROUND(-1.23) |

+--------------+

|           -1 |

+--------------+

1 row in set (0.00 sec)



mysql> SELECT ROUND(-1.58);

+--------------+

| ROUND(-1.58) |

+--------------+

|           -2 |

+--------------+

1 row in set (0.00 sec)



mysql> SELECT ROUND(1.58);

+-------------+

| ROUND(1.58) |

+-------------+

|           2 |

+-------------+

1 row in set (0.00 sec)

21. 31. ROUND
	21. 31. 1.	ROUND(X), ROUND(X,D) rounds the argument X to D decimal places.
	21. 31. 2.	ROUND(1.298, 1)
	21. 31. 3.	ROUND(1.298, 0)
	21. 31. 4.	ROUND(23.298, -1)
	21. 31. 5.	ROUND(150.000,2)/ROUND(150,2)
	21. 31. 6.	Rounding value in a column
	21. 31. 7.	How rounding differs for exact and approximate values:

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