SQLiteException: database is locked (code 5 SQLITE_BUSY)是什么原因造成的
时间: 2024-04-21 15:25:27 浏览: 19
这个错误通常是由于多个线程或进程同时访问同一个SQLite数据库文件而引起的。当一个线程或进程正在对数据库进行写操作时,其他线程或进程可能会被阻塞,直到写操作完成。如果等待时间过长,就会出现数据库锁定的情况。此外,如果你在一个事务中对数据库进行写操作,并且在该事务还未提交之前尝试对同一个数据库进行其他写操作,也可能会出现这个错误。解决此问题的方法是确保在任何时候只有一个线程或进程对数据库进行写操作,或者使用事务来协调对数据库的访问。
相关问题
android.database.sqlite.SQLiteException: near "&": syntax error (code 1 SQLITE_ERROR): , while compiling: SELECT * FROM drafts WHERE book_id1=? && title like ?
这个错误通常是由 SQL 语法错误引起的。在你的 SQL 语句中,使用了 `&&` 运算符,但是 SQLite 不支持这个运算符,正确的运算符是 `AND`。
你需要将你的 SQL 语句修改为:
```
SELECT * FROM drafts WHERE book_id1=? AND title like ?
```
这样就可以避免这个错误了。
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.