SQL ROUND () function
ROUND () function
ROUND () function for the numeric field rounded to the specified number of decimal places.
SQL ROUND () syntax
SELECT ROUND(column_name,decimals) FROM table_name;
| 参数 | 描述 |
|---|---|
| column_name | 必需。要舍入的字段。 |
| decimals | 必需。规定要返回的小数位数。 |
SQL ROUND () examples
ROUND (X): returns an integer parameter X rounded.
mysql> select ROUND(-1.23);
-> -1
mysql> select ROUND(-1.58);
-> -2
mysql> select ROUND(1.58);
-> 2
ROUND (X, D): Returns the parameter X has rounded D is a decimal digit. If D is 0, the result will have no decimal point or fractional part.
mysql> select ROUND(1.298, 1);
-> 1.3
mysql> select ROUND(1.298, 0);
-> 1
NOTE: ROUND return value is converted to a BIGINT!