Oracle 從多個表中刪除行

Question

我正在嘗試從多個表中刪除行，但在 medewerkers m 中出現語法錯誤，

誰能告訴我我在這里做錯了什么？ ：

 declare v_mnr medewerkers.mnr%type; procedure ontsla_med(p_mnr in medewerkers.mnr%type) IS BEGIN DELETE FROM medewerkers m, INSCHRIJVINGEN i , UITVOERINGEN u WHERE m.MNR = p_mnr and i.cursus = p_mnr and u.docent = p_mnr; END ontsla_med; BEGIN ontsla_med(7000); END;

好像刪除語句是錯誤的？

Answer 1

做不到。 它必須是三個單獨的刪除。

DELETE 
  FROM medewerkers
 WHERE mnr = p_mnr;

DELETE 
  FROM UITVOERINGEN 
 WHERE cursus = p_mnr;

DELETE 
  FROM UITVOERINGEN 
 WHERE docent = p_mnr;