You need to pass in a sequence, but you forgot the comma to make your parameters a tuple: cursor.execute(‘INSERT INTO images VALUES(?)’, (img,)) Without the comma, (img) is just a grouped expression, not a tuple, and thus the img string is treated as the input sequence. If that string is 74 characters long, then Python … Read more
You need the SQLite3 development headers for the gem’s native extension to compile against. You can install them by running (possibly with sudo): apt-get install libsqlite3-dev
From https://system.data.sqlite.org: System.Data.SQLite is an ADO.NET adapter for SQLite. System.Data.SQLite was started by Robert Simpson. Robert still has commit privileges on this repository but is no longer an active contributor. Development and maintenance work is now mostly performed by the SQLite Development Team. The SQLite team is committed to supporting System.Data.SQLite long-term. “System.Data.SQLite is the … Read more
Thought I’d just add my $0.02 here about my ORMLite package. It is a lightweight replacement to Hibernate and uses native Android OS database calls to support SQLite on Android. It also supports many other database types using JDBC on other architectures. We have an Android mailing list for ORMLite questions.
Here is a link to the official docs which include the main points in this answer: android.database.sqlite package-level javadoc Kotlin code to get framework SQLite version (tip: just stick a breakpoint in your Activity onCreate() and use this code in Evaluate Expression…): val version = android.database.sqlite.SQLiteDatabase.create(null).use { android.database.DatabaseUtils.stringForQuery(it, “SELECT sqlite_version()”, null) } “Framework (API ${android.os.Build.VERSION.SDK_INT}) … Read more
PRAGMA table_info(table_name); This will work for both: command-line and when executed against a connected database. A link for more details and example. thanks SQLite Pragma Command
In windows you can try this program http://www.nirsoft.net/utils/opened_files_view.html to find out the process is handling db file. Try closed that program for unlock database In Linux and macOS you can do something similar, for example, if your locked file is development.db: $ fuser development.db This command will show what process is locking the file: > … Read more
ALTER TABLE SQLite SQLite supports a limited subset of ALTER TABLE. The ALTER TABLE command in SQLite allows the user to rename a table or to add a new column to an existing table. It is not possible to rename a column, remove a column, or add or remove constraints from a table. You can: … Read more
Although Core Data is a descendant of Apple’s Enterprise Object Framework, an object-relational mapper (ORM) that was/is tightly tied to a relational backend, Core Data is not an ORM. It is, in fact, an object graph management framework. It manages a potentially very large graph of object instances, allowing an app to work with a … Read more
SQLiteOpenHelper onCreate() and onUpgrade() callbacks are invoked when the database is actually opened, for example by a call to getWritableDatabase(). The database is not opened when the database helper object itself is created. SQLiteOpenHelper versions the database files. The version number is the int argument passed to the constructor. In the database file, the version … Read more