您可以使用MySQL的TRUNCATE()函数将数字格式化为2位小数。语法如下：
SELECT TRUNCATE(yourColumnName,2) as anyVariableName from yourTableName;为了理解上面的语法，让我们首先创建一个表。创建表的查询如下 -
mysql> create table FormatNumberTwoDecimalPlace
-> (
-> Number float
-> );
Query OK, 0 rows affected (0.59 sec)使用插入命令在表中插入一些记录。查询如下所示 −
mysql> insert into FormatNumberTwoDecimalPlace values(123.456);
Query OK, 1 row affected (0.13 sec)
mysql> insert into FormatNumberTwoDecimalPlace values(1.6789);
Query OK, 1 row affected (0.19 sec)
mysql> insert into FormatNumberTwoDecimalPlace values(12.2);
Query OK, 1 row affected (0.14 sec)
mysql> insert into FormatNumberTwoDecimalPlace values(12356.23145);
Query OK, 1 row affected (0.40 sec)
mysql> insert into FormatNumberTwoDecimalPlace values(12356);
Query OK, 1 row affected (0.14 sec)
mysql> insert into FormatNumberTwoDecimalPlace values(.5678);
Query OK, 1 row affected (0.28 sec)让我们现在使用select命令显示表中的所有记录。查询如下所示−
mysql> select *from FormatNumberTwoDecimalPlace;输出
+---------+
| Number |
+---------+
| 123.456 |
| 1.6789 |
| 12.2 |
| 12356.2 |
| 12356 |
| 0.5678 |
+---------+
6 rows in set (0.04 sec)这是将数字格式化为两位小数的查询 -
mysql> select truncate(Number,2) as TwoValueAfterDecimal from
FormatNumberTwoDecimalPlace;输出
+----------------------+
| TwoValueAfterDecimal |
+----------------------+
| 123.45 |
| 1.67 |
| 12.19 |
| 12356.23 |
| 12356.00 |
| 0.56 |
+----------------------+
6 rows in set (0.00 sec)
