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 fromformatnumbertwodecimalplace;
输出+----------------------+| twovalueafterdecimal |+----------------------+| 123.45 || 1.67 || 12.19 || 12356.23 || 12356.00 || 0.56 |+----------------------+6 rows in set (0.00 sec)
以上就是mysql中如何将数字格式化为小数点后两位？的详细内容。