如何解锁 SQLite3 表？

Question

I'm beginner in SQL/PHP,I want to delete a column from a table with sqlite3, I use this method but when I try to execute it with php I have this error when I execute the query:

$statement = $pdo->exec("CREATE TABLE t1_backup AS SELECT $columns FROM $tableName;DROP TABLE $tableName;ALTER TABLE t1_backup RENAME TO $tableName;");

Error: Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 6 database table is locked

Whereas it works if I manually execute the query... What's the problem??

• I tried to add sleep() but nothing...
• I tried to execute query one by one but nothing...
• I try to add "BEGIN TRANSACTION" & "COMMIT"

Thank you !

Answer 1

check your SQLiteBrowser or any other editor is on and if there is any unsaved changes.