Propiedades de unión

Si hace doble clic en una conexión entre dos campos vinculados en el diseño de consulta o si selecciona Insertar - Nueva relación, aparece el diálogo Propiedades de unión. Estas propiedades se utilizarán en todas las consultas creadas en el futuro.

Para acceder a esta orden…

Abra el diseño de consultas y seleccione Insertar ▸ Relación nueva o pulse dos veces en una línea de conexión entre dos tablas.


Tablas utilizadas

Especifica dos tablas diferentes que desea unir.

Campos involucrados

Especifica dos campos de datos que se unirán mediante una relación.

Opciones

Tipo

Specifies the join type of the selected join. Some databases support only a subset of the various possible types.

Interna

In an inner join, the results table contains only those records for which the content of the linked fields is the same. In LibreOffice SQL this type of link is created by a corresponding WHERE clause.

Izquierda

In a left join, the results table contains all records of the queried fields from the left table and only those records of the queried fields from the right table for which the content of the linked fields is the same. In LibreOffice SQL this type of link corresponds to the LEFT OUTER JOIN command.

Derecha

In a right join, the results table contains all records of the queried fields from the right table and only those records of the queried fields from the left table for which the content of the linked fields is the same. In LibreOffice SQL this type of link corresponds to the RIGHT OUTER JOIN command.

Completa

In a full join, the results table contains all records of the queried fields from the left and right tables. In the SQL of LibreOffice this type of link corresponds to the FULL OUTER JOIN command.

Natural

In a natural join, the keyword NATURAL in inserted into the SQL statement that defines the relation. The relation joins all columns that have the same column name in both tables. The resulting joined table contains only one column for each pair of equally named columns.

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