Elkartze-propietateak

Kontsulta-diseinuan estekatutako bi eremuren arteko lotura-marran klik bikoitza egiten bada edo Txertatu – Erlazio berria aukeratzen bada, Elkartze-propietateak elkarrizketa-koadroa agertuko da. Propietate horiek aurrerantzean sortutako kontsulta guztietan erabiliko dira.

Komando hau erabiltzeko...

Kontsulta-diseinua ireki, eta aukeratu Txertatu - Erlazio berria, edo egin klik bikoitza bi taulen arteko lotura-marran.


Parte hartzen duten taulak

Specifies two different tables that you want to join.

Parte hartzen duten eremuak

Erlazio baten bidez elkartuko diren bi datu-eremu zehazten ditu.

Aukerak

Mota

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

Inner Join

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.

Left Join

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.

Right Join

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.

Full Join

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.

Emaguzu laguntza!