https://stackoverflow.com › questions › 8442147

The DROP COLUMN syntax is used to remove an existing column from a table. The DROP COLUMN command removes the named column from the table, and also rewrites the entire table to purge the data associated with that column.

https://stackoverflow.com › questions › 5938048

For example, suppose you have a table named "t1" with columns names "a", "b", and "c" and that you want to delete column "c" from this table. The following steps illustrate how this could be done:

https://sqlite.org › lang_altertable.html

The DROP COLUMN command removes the named column from the table, and rewrites its content to purge the data associated with that column. The DROP COLUMN command only works if the column is not referenced by any other parts of the schema and is not a PRIMARY KEY and does not have a UNIQUE constraint. Possible reasons why the DROP COLUMN command ...

https://thelinuxcode.com › add-and-delete-column-sqlite

First, what exactly does it mean to add or remove a column in SQLite? SQLite is a flexible, file-based database that stores data in tables containing rows and columns. By using SQLite‘s ALTER TABLE command, you can dynamically modify tables at any time by: Adding new columns to store additional data attributes as requirements change.

https://www.dbpilot.io › sql-guides › sqlite › how-to-drop-a-column-in-sqlite

How to Rename a Column. Composite Primary Keys. SQL Guides. SQLite. How to Drop a Column in SQLite. How to Drop a Column in SQLite. This example deletes the column my_column of table my_table: ALTERTABLE my_table DROPCOLUMN my_column; Copy code.

https://www.sqlitetutor.com › drop-column

The SQLite DROP COLUMN keyword drops an existing column from an SQLite table. To drop a column, use the ALTER TABLE command followed by the DROP COLUMN keyword. To understand better, follow the DROP COLUMN syntax below.

https://www.quickprogrammingtips.com › sqlite › how-to-add-or-remove-columns-from-sqlite...

If you are using sqlite 3.35 or later you can use the following commands, Add a column - ALTER TABLE [table name] ADD COLUMN [column name] Rename a column - ALTER TABLE [table name] RENAME COLUMN [column name] Remove a column - ALTER TABLE [table name] DROP COLUMN [column name]

https://www.techonthenet.com › sqlite › tables › alter_table.php

The SQLite ALTER TABLE statement is used to add, modify, or drop/delete columns in a table. The SQLite ALTER TABLE statement is also used to rename a table. Add column in table. Syntax. The syntax to ADD A COLUMN in a table in SQLite (using the ALTER TABLE statement) is: ALTER TABLE table_name. ADD new_column_name column_definition; table_name.

https://blog.niklasottosson.com › databases › how-to-drop-a-column-in-sqlite-3

First we create a new table with all the columns and data we want to save. CREATE TABLE my_table_temp AS (SELECT id, user_id, latitude, longitude FROM my_table); Then we drop the old table. DROP my_table; And finally we rename our new table with the old name. ALTER TABLE my_table_temp RENAME TO my_table Done! Tested on OSX 10.7.5 and SQLite v3.7.11