麻烦你帮我解释下列Node.js调用Sqlite的报错:[Error: SQLITE_MISUSE: Database handle is closed Emitted 'error' event on Database instance at: ] { errno: 21, code: 'SQLITE_MISUSE' }
时间: 2023-03-24 09:04:35 浏览: 102
这个错误是由于数据库句柄已经关闭,但是仍然在尝试使用它,导致出现了 SQLITE_MISUSE 错误。可能是在关闭数据库之后,仍然在尝试使用它,或者是在多个线程中同时使用同一个数据库句柄。建议检查代码中是否存在这样的情况,并进行相应的修改。
相关问题
android.database.sqlite.SQLiteException: no such table: rundata (code 1 SQLITE_ERROR): , while compiling:
This error indicates that the SQLite database you are trying to query does not contain a table named "rundata". This could be due to a few reasons:
1. The table has not been created yet: Make sure you have executed the SQL query to create the "rundata" table before trying to query it.
2. The table was deleted: If you or your application deleted the "rundata" table, you will need to recreate it before querying it again.
3. The table was renamed: If the "rundata" table was renamed, make sure you are querying the correct table name.
4. The table is in a different database: If the "rundata" table is in a different database than the one you are currently querying, you will need to connect to that database first before querying the table.
You can check if the "rundata" table exists in your database by running the following query:
```
SELECT name FROM sqlite_master WHERE type='table' AND name='rundata';
```
This will return the name of the table if it exists in your database.
你的代码还是继续报错System.Data.SQLite.SQLiteException:“SQL logic error near "pass_rate": syntax error”
非常抱歉,可能是因为查询语句中的语法错误,导致了错误。请尝试以下代码:
```
SELECT 审核年份 as audit_year, 季度 as quarter, ROUND(CAST(SUM(CASE WHEN 审核结论 = '通过' THEN 1 ELSE 0 END) AS FLOAT) / COUNT(*) * 100, 2) || '%' as pass_rate FROM FAIsum GROUP BY 审核年份, 季度;
```
这个查询语句会计算每个季度审核结论值是通过的百分比,并将结果舍入到两位小数。然后,它使用 `||` 操作符将百分比符号添加到结果的末尾。
请注意,如果您的数据表中的字段名是中文的,请将查询中的字段名替换为实际的中文字段名。如果您的查询仍然出现问题,请告诉我查询语句报错的具体信息,我会尽力帮助您解决问题。