Orange: SQL Table
Sumber: https://docs.biolab.si//3/visual-programming/widgets/data/sqltable.html
Reads data from an SQL database.
Outputs
Data: dataset from the database
The SQL widget accesses data stored in an SQL database. It can connect to PostgreSQL (requires psycopg2 module) or SQL Server (requires pymssql module).
To handle large databases, Orange attempts to execute a part of the computation in the database itself without downloading the data. This only works with PostgreSQL database and requires quantile and tsm_system_time extensions installed on server. If these extensions are not installed, the data will be downloaded locally.
../../_images/SQLTable-stamped.png
Database type (can be either PostgreSQL or MSSQL).
Host name.
Database name.
Username.
Password.
Press the blue button to connect to the database. Then select the table in the dropdown.
Auto-discover categorical variables will cast INT and CHAR columns with less than 20 distinct values as categorical variables (finding all distinct values can be slow on large tables). When not selected, INT will be treated as numeric and CHAR as text. Download to local memory downloads the selected table to your local machine.
- Installation Instructions
- PostgreSQL
Install the backend.
pip install psycopg2
Alternatively, you can follow these instructions for installing the backend.
Install the extensions. [optional]
- MSSQL
Install the backend.
pip install pymssql
If you are encountering issues, follow these instructions.
- Example
Here is a simple example on how to use the SQL Table widget. Place the widget on the canvas, enter your database credentials and connect to your database. Then select the table you wish to analyse.
Connect SQL Table to Data Table widget to inspect the output. If the table is populated, your data has transferred correctly. Now, you can use the SQL Table widget in the same way as the File widget.
../../_images/SQLTable-Example.png