1093 - You can't specify target table 'phone_wash' for update in FROM clause
时间: 2024-03-08 16:35:24 浏览: 52
这个问题通常是由于 MySQL 对于使用子查询做更新操作时的限制所导致的。在这种情况下,你需要使用一个临时表或者使用 JOIN 操作来进行更新操作。具体做法可以参考以下 SQL 语句:
UPDATE phone_wash SET status = 1 WHERE id IN (SELECT * FROM (SELECT id FROM phone_wash WHERE status = 0 AND user_id = 1234) AS temp);
这里我们使用了一个临时表来避免使用子查询更新操作的限制。当然,也可以使用 JOIN 操作来完成相同的更新,具体做法可以参考以下 SQL 语句:
UPDATE phone_wash
JOIN (SELECT id FROM phone_wash WHERE status = 0 AND user_id = 1234) AS temp
ON phone_wash.id = temp.id
SET phone_wash.status = 1;
希望这些能对你有所帮助。
相关问题
You can t specify target table res_device_info for update in FROM clause
This error message usually occurs in SQL when you try to update a table that is also used in the FROM clause of the same query. To resolve this issue, you can use a subquery to update the table instead. Here's an example:
```sql
UPDATE res_device_info
SET column_name = new_value
WHERE device_id IN (
SELECT device_id
FROM res_device_info
WHERE condition
);
```
In this example, you can replace `column_name`, `new_value`, `condition` with the appropriate values for your scenario. Make sure to adjust the subquery's condition to match your requirements.
1093 - You can't specify target table "jobdataa' for update in FROM clause
这个错误是由于在MySQL中,不允许在UPDATE语句中直接引用正在被更新的表。这是为了避免潜在的数据冲突和死锁情况。
解决这个问题的一种方法是使用子查询来绕过这个限制。你可以将要更新的表作为子查询的一部分,并在外部查询中引用它。以下是一个示例:
```
UPDATE jobdataa
SET column1 = 'value'
WHERE id IN (
SELECT id
FROM (
SELECT id
FROM jobdataa
WHERE condition
) AS subquery
);
```
请注意,上述示例中的"condition"应该替换为你实际的更新条件。
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