PL/SQL Trigger pro aktualizaci jiné tabulky z INSERT na jedné tabulce

zkuste toto:

Syntaxe bude

CREATE OR REPLACE TRIGGER test_trig
AFTER INSERT OR UPDATE ON tableA
FOR EACH ROW

BEGIN
  UPDATE tableB
  SET columnZ = columnZ + 1
  WHERE tableB.columnX = :NEW.columnX;
END test_trig; 
/

:new.columnX odkazuje na tabulku A columnX.