如何通过在 MySQL table 中用点替换逗号来避免导入数字时出现警告？

Question

我在 Mysql 中有一个 table 看起来像：

CREATE TABLE `overig`.`test`(
`ID` INT(10) AUTO_INCREMENT,
`Order_ID` DECIMAL(10) NOT NULL,
`Price_total` DECIMAL(12,2),
PRIMARY KEY (`ID`)
);

我要导入以下 CSV：

Order_ID;Price_total
145131343;118,8
145131349;

我将 CSV 数据加载到 MYSQL table:

LOAD DATA LOCAL INFILE 'test3.csv' INTO TABLE `overig`.`test` FIELDS TERMINATED BY ';' ENCLOSED BY '"' LINES TERMINATED BY '\n' IGNORE 1 LINES (
`Order_ID`, @Price_total)
SET 
`Price_total`  = REPLACE(@Price_total, ',', '.');

The response:
Query OK, 2 rows affected, 1 warning (0.00 sec)
Records: 2  Deleted: 0  Skipped: 0  Warnings: 0

mysql> show warnings;
+---------+------+---------------------------------------------------------------+
| Level   | Code | Message                                                       |
+---------+------+---------------------------------------------------------------+
| Warning | 1366 | Incorrect decimal value: '' for column 'Price_total' at row 2 |
+---------+------+---------------------------------------------------------------+
1 row in set (0.00 sec)

当 Price_total 为空值时如何避免此警告？

Answer 1

使用隐式转换。

LOAD DATA LOCAL INFILE 'test3.csv' 
INTO TABLE `overig`.`test` 
FIELDS TERMINATED BY ';' 
ENCLOSED BY '"' 
LINES TERMINATED BY '\n' 
IGNORE 1 LINES 
(`Order_ID`, @Price_total)
SET `Price_total` = 0 + REPLACE(@Price_total, ',', '.');

Answer 2

我解决了

在 SQL table 中加载“ ”时出现问题。

当使用 IF 语句时 它会在没有警告的情况下正确运行。

我用过：

LOAD DATA LOCAL INFILE 'test3.csv' 
INTO TABLE `overig`.`test` 
FIELDS TERMINATED BY ';' 
ENCLOSED BY '"' 
LINES TERMINATED BY '\n' 
IGNORE 1 LINES 
(`Order_ID`, @Price_total)
SET `Price_total` = 
IF(@Price_total = '', NULL, REPLACE(@Price_total, ',', '.'));

如何通过在 MySQL table 中用点替换逗号来避免导入数字时出现警告？

How can I avoid warnings when importing numbers by replacing comma's with a dot in a MySQL table?

mysql

csv

import

warnings

replace