Modify a Column's Type in sqlite3
SQLite doesn't support removing or modifying columns, apparently. But do remember that column data types aren't rigid in SQLite, either.
See also:
- SQLite Modify Column
If you prefer a GUI, DB Browser for SQLite will do this with a few clicks.
- "File" - "Open Database"
- In the "Database Structure" tab, click on the table content (not table name), then "Edit" menu, "Modify table", and now you can change the data type of any column with a drop down menu. I changed a 'text' field to 'numeric' in order to retrieve data in a number range.
DB Browser for SQLite is open source and free. For Linux it is available from the repository.
It is possible by recreating table.Its work for me please follow following step:
- create temporary table using as select * from your table
- drop your table, create your table using modify column type
- now insert records from temp table to your newly created table
- drop temporary table
do all above steps in worker thread to reduce load on uithread