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sql select fra to tabeller



Hej,

Hvordan er det lige man laver et (postgresql) select fra to tabeller og får det samlet i en?

Jeg vil gerne have:

SELECT dato FROM tabel_a WHERE dato > date('now'); samlet med
SELECT dato FROM tabel_b WHERE dato > date('now');

Så jeg kan have et "ORDER BY dato LIMIT 3" på den samlede tabel.


Et andet spørgsmål, i samme stil. Hvordan får man:


SELECT fornavn, efternavn FROM tabel;

samlet til bare "navn" og ikke to kolonner?



 
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