为什么我会收到错误 1264：第 1 行的 'ping' 列值超出范围？

Question

ping 的大小是 10，

table 数据为 {'ping': 48.68, 'download': 0.41, 'upload': 0.12}

那么大小为 5 的浮点值怎么抛出错误：

mysql.connector.errors.DatabaseError: 1264: Out of range value for column 'ping' at row 1

这是我的mysqltable

+----------------+--------------+------+-----+-------------------+----------------+
| Field          | Type         | Null | Key | Default           | Extra          |
+----------------+--------------+------+-----+-------------------+----------------+
| id             | int(11)      | NO   | PRI | NULL              | auto_increment |
| ping           | float(10,10) | YES  |     | NULL              |                |
| download       | float(10,10) | YES  |     | NULL              |                |
| upload         | float(10,10) | YES  |     | NULL              |                |
| datetime_added | timestamp    | NO   |     | CURRENT_TIMESTAMP |                |
+----------------+--------------+------+-----+-------------------+----------------+

Answer 1

类型：

Floating-Point Types

MySQL permits a nonstandard syntax: FLOAT(M,D) or REAL(M,D) or DOUBLE PRECISION(M,D). Here, (M,D) means than values can be stored with up to M digits in total, of which D digits may be after the decimal point.

因此：float(10,10) 不允许存储 48.68。小数点前只能是0.

db<>fiddle demo