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Complemento administrador de BBDD

The DB Manager Plugin is officially part of the QGIS core and is intended to replace the SPIT Plugin and, additionally, to integrate all other database formats supported by QGIS in one user interface. The icon_dbmanager DB Manager Plugin provides several features. You can drag layers from the QGIS Browser into the DB Manager, and it will import your layer into your spatial database. You can drag and drop tables between spatial databases and they will get imported. .. _figure_db_manager:

Figure DB Manager 1:

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DB Manager dialog nix

El menú Base de datos permite conectar a una base de datos existente, para iniciar la ventana de SQL y para finalizar el componente de Administrador de BBDD. Una vez que este conectado a la base de datos existente, los menús Esquema y Tabla aparecerá de forma adicional.

EL menú Esquema incluye herramientas para crear y eliminar (vaciar) esquemas y, si la topología esta disponible (e.j., PostGIS 2), iniciar un TopoViewer.

The Table menu allows you to create and edit tables and to delete tables and views. It is also possible to empty tables and to move tables from one schema to another. As further functionality, you can perform a VACUUM and then an ANALYZE for each selected table. Plain VACUUM simply reclaims space and makes it available for reuse. ANALYZE updates statistics to determine the most efficient way to execute a query. Finally, you can import layers/files, if they are loaded in QGIS or exist in the file system. And you can export database tables to shape with the Export File feature.

The Tree window lists all existing databases supported by QGIS. With a double-click, you can connect to the database. With the right mouse button, you can rename and delete existing schemas and tables. Tables can also be added to the QGIS canvas with the context menu.

Si se está conectado a una base de datos, la ventana principal del Administrador de BBDD ofrece tres pestañas. La pestaña Info proporciona información acerca de la tabla y su geometría, así como de los campos existentes, limitaciones e índices. También permite que ejecute Vacuum Analyze y crear índices espaciales en una tabla seleccionada, si no está ya hecho. La pestaña de Tabla muestra todos los atributos y la pestaña Vista preliminar representa las geometrías como vista previa.

Trabajar con la ventana SQL

You can also use the DB Manager to execute SQL queries against your spatial database and then view the spatial output for queries by adding the results to QGIS as a query layer. It is possible to highlight a portion of the SQL and only that portion will be executed when you press F5 or click the Execute (F5) button.

Figure DB Manager 2:

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Executing SQL queries in the DB Manager SQL window nix