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Nov 22nd, 2019
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  1. CREATE OR REPLACE FUNCTION CONTROLEER_OVERLAPPINGEN
  2. (p_zaalnr voorstellingen.zaal_zaalnr%type,
  3. p_datum voorstellingen.starttijdstip%type
  4. )
  5.  
  6. RETURN VARCHAR2 AS
  7.  
  8. v_id voorstellingen.voorstellingid%type;
  9.  
  10.  
  11. BEGIN
  12.  
  13. select count(voorstellingid) into v_id
  14. from voorstellingen
  15. where starttijdstip = p_datum
  16. and zaal_zaalnr = p_zaalnr;
  17.  
  18. IF v_id = 0
  19. THEN return 'FALSE';
  20. ELSE
  21. return 'TRUE';
  22. END IF;
  23.  
  24. END CONTROLEER_OVERLAPPINGEN;
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