Merge Statement SQL Syntax

Question

I am trying to compare 2 ID's from different tables and if they don't match the row that isn't in the source should be added.

But I am getting this error:

PLS-00103: Encountered the symbol "Person" when expecting one of the following: : = ( @ % ;

Code:

CREATE OR REPLACE PROCEDURE merge_test AS
BEGIN
  MERGE person AS p
  USING person_test AS t 
     ON t.person_id = p.person_id 
   WHEN NOT MATCHED BY TARGET THEN
   INSERT(person_id,vorname, nachname, mobil, telefon, fax, e_mail, fgh_id)
   VALUES(t.person_id, t.vorname, t.nachname, t.mobil, t.telefon, t.fax, t.e_mail, t.fgh_id);
END;
/

Maybe my Syntax is wrong or i have to add an "execute immediate"? I am pretty new to SQL and PL/SQL.

Answer 1

There are some issues in your MERGE statement :

• take t.person_id = p.person_id into parentheses
• Oracle doesn't allow aliasing tables with AS keyword. Get rid of them
• this usage ( Using person_test as t ) is not possible, but use a subquery( Using (select ... from person_test) t )
• remove the clause by target from When not matched by target then
• A MERGE statement needs to be followed by an INTO clause
• the matching condition t.person_id = p.person_id after ON clause should be parenthesed

So use:

MERGE INTO person p
USING (SELECT person_id,
              vorname,
              nachname,
              mobil,
              telefon,
              fax,
              e_mail,
              fgh_id
         from person_test) t
ON (t.person_id = p.person_id)
WHEN NOT MATCHED 
THEN INSERT(person_id, vorname, nachname, mobil, telefon, fax, e_mail, fgh_id) 
     VALUES(t.person_id, t.vorname, t.nachname, t.mobil, t.telefon, t.fax, t.e_mail, t.fgh_id);