Question

我的数据库中有一行无法删除。我在python中运行了这个SQL并得到了这个错误：

MariaDB [cryptotrader2]> INSERT INTO `trades` VALUES("gemini",2465337307,17317.010000,0.008923,1513178949);
    ERROR 1062 (23000): Duplicate entry 'gemini-2147483647' for key 'PRIMARY'

这很奇怪，因为我没有影响那个条目。我发现只有一行exchange ='gemini'，我无法删除它或添加其他条目，其中exchange ='gemini'。或者至少不是来自我的python程序。我确实设法进行了手动输入，如下所示。我对其他交换名称的条目没有问题，它只是双子座。

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MariaDB [cryptotrader2]> select * from trades where exchange='gemini'
    ->
    -> ;
+----------+------------+----------+------------+------------+
| exchange | trade_id   | price    | volume     | timestamp  |
+----------+------------+----------+------------+------------+
| gemini   | 2147483647 | 17395.80 | 0.06573300 | 1513178007 |
+----------+------------+----------+------------+------------+
1 row in set (0.00 sec)

MariaDB [cryptotrader2]> delete from trades where exchange='gemini';
Query OK, 1 row affected (0.01 sec)

MariaDB [cryptotrader2]> select * from trades where exchange='gemini';
+----------+------------+----------+------------+------------+
| exchange | trade_id   | price    | volume     | timestamp  |
+----------+------------+----------+------------+------------+
| gemini   | 2147483647 | 17385.33 | 0.07917300 | 1513178234 |
+----------+------------+----------+------------+------------+
1 row in set (0.00 sec)

MariaDB [cryptotrader2]> insert into trades values ('gemini',1234564560,17000,1,1513178235);
Query OK, 1 row affected (0.00 sec)

MariaDB [cryptotrader2]> select * from trades where exchange='gemini';          +----------+------------+----------+------------+------------+
| exchange | trade_id   | price    | volume     | timestamp  |
+----------+------------+----------+------------+------------+
| gemini   | 1234564560 | 17000.00 | 1.00000000 | 1513178235 |
| gemini   | 2147483647 | 17385.33 | 0.07917300 | 1513178234 |
+----------+------------+----------+------------+------------+
2 rows in set (0.01 sec)

MariaDB [cryptotrader2]> delete from trades where exchange='gemini';            Query OK, 2 rows affected (0.00 sec)

MariaDB [cryptotrader2]> select * from trades where exchange='gemini';
+----------+------------+----------+------------+------------+
| exchange | trade_id   | price    | volume     | timestamp  |
+----------+------------+----------+------------+------------+
| gemini   | 2147483647 | 17390.16 | 0.87946700 | 1513178350 |
+----------+------------+----------+------------+------------+
1 row in set (0.00 sec)

Answer 1

它显然已被删除，但在某处你有一个upsert为gemini创建一个条目。了解价格，数量和时间戳如何变化。

我应该说错误的原因是INT的最大签名值为2147483647.您尝试插入更高值（2465337307）的尝试显然会被截断到最大值，在这种情况下是真的，您已经有一个gemini的条目，2147483647。尝试插入

    INSERT INTO `trades` VALUES("gemini",2147483646,17317.010000,0.008923,1513178949);

使用你的python程序。

SQL行不会删除。没有错误

1 个答案: