stevearc / Dql
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DQL
:Build: |build|_ |coverage|_ :Documentation: http://dql.readthedocs.org/ :Downloads: http://pypi.python.org/pypi/dql :Source: https://github.com/stevearc/dql
.. |build| image:: https://travis-ci.org/stevearc/dql.png?branch=master .. _build: https://travis-ci.org/stevearc/dql .. |coverage| image:: https://coveralls.io/repos/stevearc/dql/badge.png?branch=master .. _coverage: https://coveralls.io/r/stevearc/dql?branch=master
A simple, SQL-ish language for DynamoDB
As of November 2020, Amazon has released PartiQL support <https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ql-reference.html>
__
for DynamoDB. You should investigate that first to see if it addresses your
needs.
Getting Started
The easiest way to use DQL is to download and run the install script::
curl -o install.py https://raw.githubusercontent.com/stevearc/dql/master/bin/install.py
python install.py
This will create a standalone dql
file that you can run. If you would
instead like to install it with pip::
pip install dql
Here are some basic DQL examples to get you going:
Start the REPL::
$ dql
us-west-1>
Creating a table::
us-west-1> CREATE TABLE forum_threads (name STRING HASH KEY,
> subject STRING RANGE KEY,
> THROUGHPUT (4, 2));
Inserting data::
us-west-1> INSERT INTO forum_threads (name, subject, views, replies)
> VALUES ('Self Defense', 'Defense from Banana', 67, 4),
> ('Self Defense', 'Defense from Strawberry', 10, 0),
> ('Cheese Shop', 'Anyone seen the camembert?', 16, 1);
Queries::
us-west-1> SCAN * FROM forum_threads;
us-west-1> SELECT count(*) FROM forum_threads WHERE name = 'Self Defense';
us-west-1> SELECT * FROM forum_threads WHERE name = 'Self Defense';
Mutations::
us-west-1> UPDATE forum_threads ADD views 1 WHERE
> name = 'Self Defense' AND subject = 'Defense from Banana';
us-west-1> DELETE FROM forum_threads WHERE name = 'Cheese Shop';
Changing tables::
us-west-1> ALTER TABLE forum_threads SET THROUGHPUT (8, 4);
us-west-1> DROP TABLE forum_threads;
And don't forget to use help
!