MySQL中如何将数字格式化为小数点后两位？

SELECT TRUNCATE(yourColumnName,两) as anyVariableName from yourTableName;

mysql> create table FormatNumberTwoDecimalPlace
   -> (
   -> Number float
   -> );
Query OK, 0 rows affected (0.59 sec)

mysql> insert into FormatNumberTwoDecimalPlace values(1两3.456);
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(1两.两);
Query OK, 1 row affected (0.14 sec)

mysql> insert into FormatNumberTwoDecimalPlace values(1两356.两3145);
Query OK, 1 row affected (0.40 sec)

mysql> insert into FormatNumberTwoDecimalPlace values(1两356);
Query OK, 1 row affected (0.14 sec)

mysql> insert into FormatNumberTwoDecimalPlace values(.5678);
Query OK, 1 row affected (0.两8 sec)

mysql> select *from FormatNumberTwoDecimalPlace;

+---------+
| Number  |
+---------+
| 1两3.456 |
|  1.6789 |
|    1两.两 |
| 1两356.二 |
|   1两356 |
|  0.5678 |
+---------+
6 rows in set (0.04 sec)

mysql> select truncate(Number,两) as TwoValueAfterDecimal from
FormatNumberTwoDecimalPlace;

+----------------------+
| TwoValueAfterDecimal |
+----------------------+
|               1两3.45 |
|                 1.67 |
|                1二.19 |
|             1两356.两3 |
|             1两356.00 |
|                 0.56 |
+----------------------+
6 rows in set (0.00 sec)