Question

我有一张计算百分比的表，

+------+---------+-------------------+
| id1  | id2     |percentage(%)      |
+------+---------+-------------------+
|  4   |    6    |  66.6667          |
|  4   |    5    |  80.0000          |
+------+---------+-------------------+

我想在逗号后删除数字，所以结果就像这样

+------+---------+-------------------+
| id1  | id2     |percentage(%)      |
+------+---------+-------------------+
|  4   |    6    |  66               |
|  4   |    5    |  80               |
+------+---------+-------------------+

感谢您的帮助，掌握。

Answer 1

select id1,id2,round(percentage) as percentage(%) from table

试试这个..

Answer 2

您可以根据自己的要求使用ROUND，FLOOR和CEIL功能。

您也可以在插入带有其他列上的表达式的结果列时使用它们。

示例：INSERT ：

-- this results a 67
INSERT INTO my_table( a, b, p ) VALUES( 4, 6, ROUND( ( 4 * 100 ) / 6 ) );

-- alternatively
INSERT INTO my_table( a, b, p ) VALUES( 4, 6, ROUND( ( a * 100 ) / b ) );

使用上述语句，您可以限制分数部分不存储在列中。如果您仍然需要它，您可以指定小数部分的位数，例如2。

-- this results a 66.67
INSERT INTO my_table( a, b, p ) VALUES( 4, 6, ROUND( ( 4 * 100 ) / 6 ), 2 );

-- alternatively
INSERT INTO my_table( a, b, p ) VALUES( 4, 6, ROUND( ( a * 100 ) / b ), 2 );

示例：SELECT ：

SELECT 4 AS 'a', 6 AS 'b',
       ( 4 * 100 ) / 6 AS 'prcntge(%)',
       ROUND( ( 4 * 100 ) / 6, 0 ) AS 'rndd(%)',
       FLOOR( ( 4 * 100 ) / 6 ) AS 'flr(%)',
       CEIL( ( 4 * 100 ) / 6 ) AS 'ceil(%)'
UNION ALL
SELECT 5 AS 'a', 6 AS 'b',
       ( 5 * 100 ) / 6 AS 'prcntge(%)',
       ROUND( ( 5 * 100 ) / 6, 0 ) AS 'rndd(%)',
       FLOOR( ( 5 * 100 ) / 6 ) AS 'flr(%)',
       CEIL( ( 5 * 100 ) / 6 ) AS 'ceil(%)'
UNION ALL
SELECT 4 AS 'a', 5 AS 'b',
       ( 4 * 100 ) / 5 AS 'prcntge(%)',
       ROUND( ( 4 * 100 ) / 5, 0 ) AS 'rndd(%)',
       FLOOR( ( 4 * 100 ) / 5 ) AS 'flr(%)',
       CEIL( ( 4 * 100 ) / 5 ) AS 'ceil(%)'

以上查询的结果：

+---+---+------------+---------+--------+---------+
| a | b | prcntge(%) | rndd(%) | flr(%) | ceil(%) |
+---+---+------------+---------+--------+---------+
| 4 | 6 |    66.6667 |      67 |     66 |      67 |
| 5 | 6 |    83.3333 |      83 |     83 |      84 |
| 4 | 5 |    80.0000 |      80 |     80 |      80 |
+---+---+------------+---------+--------+---------+

Mysql：persentage逗号后删除数字

2 个答案: