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Tool for running transformations on columns in a SQLite database.

Project description


PyPI CircleCI License

Tool for running transformations on columns in a SQLite database.

How to install

$ pip install sqlite-transform

parsedate and parsedatetime

These subcommands will run all values in the specified column through dateutils.parser.parse() and replace them with the result, formatted as an ISO timestamp or ISO date.

For example, if a row in the database has an opened column which contains 10/10/2019 08:10:00 PM, running the following command:

$ sqlite-transform parsedatetime my.db mytable opened

Will result in that value being replaced by 2019-10-10T20:10:00.

Using the parsedate subcommand here would result in 2019-10-10 instead.

lambda for executing your own code

The lambda subcommand lets you specify Python code which will be executed against the column.

Here's how to convert a column to uppercase:

$ sqlite-transform lambda my.db mytable mycolumn --code='str(value).upper()'

The code you provide will be compiled into a function that takes value as a single argument. You can break your function body into multiple lines, provided the last line is a return statement:

$ sqlite-transform lambda my.db mytable mycolumn --code='value = str(value)
return value.upper()'

You can also specify Python modules that should be imported and made available to your code using one or more --import options:

$ sqlite-transform lambda my.db mytable mycolumn \
    --code='"\n".join(textwrap.wrap(value, 10))' \

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