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SQLite can drop columns now

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It gained that ability in 3.35.0 in 2021-03-12:
https://www.sqlite.org/changes.html#version_3_35_0
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Simon Willison 2022-01-25 17:48:57 -08:00
commit b3efb29212
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README.md
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@ -15,7 +15,7 @@ Python CLI utility and library for manipulating SQLite databases.
- [Pipe JSON](https://sqlite-utils.datasette.io/en/stable/cli.html#inserting-json-data) (or [CSV or TSV](https://sqlite-utils.datasette.io/en/stable/cli.html#inserting-csv-or-tsv-data)) directly into a new SQLite database file, automatically creating a table with the appropriate schema
- [Run in-memory SQL queries](https://sqlite-utils.datasette.io/en/stable/cli.html#querying-data-directly-using-an-in-memory-database), including joins, directly against data in CSV, TSV or JSON files and view the results.
- [Configure SQLite full-text search](https://sqlite-utils.datasette.io/en/stable/cli.html#configuring-full-text-search) against your database tables and run search queries against them, ordered by relevance
- Run [transformations against your tables](https://sqlite-utils.datasette.io/en/stable/cli.html#transforming-tables) to make schema changes that SQLite `ALTER TABLE` does not directly support, such as dropping columns
- Run [transformations against your tables](https://sqlite-utils.datasette.io/en/stable/cli.html#transforming-tables) to make schema changes that SQLite `ALTER TABLE` does not directly support, such as changing the type of a column
- [Extract columns](https://sqlite-utils.datasette.io/en/stable/cli.html#extracting-columns-into-a-separate-table) into separate tables to better normalize your existing data
Read more on my blog: [

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docs/python-api.rst
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@ -1247,7 +1247,7 @@ Pass ``ignore=True`` if you want to ignore the error caused by the table or view
Transforming a table
====================
The SQLite ``ALTER TABLE`` statement is limited. It can add columns and rename tables, but it cannot drop columns, change column types, change ``NOT NULL`` status or change the primary key for a table.
The SQLite ``ALTER TABLE`` statement is limited. It can add and drop columns and rename tables, but it cannot change column types, change ``NOT NULL`` status or change the primary key for a table.
The ``table.transform()`` method can do all of these things, by implementing a multi-step pattern `described in the SQLite documentation <https://www.sqlite.org/lang_altertable.html#otheralter>`__: