Oracle 从多个表中删除行

Question

我正在尝试从多个表中删除行，但在 medewerkers m 中出现语法错误，

谁能告诉我我在这里做错了什么？：

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;

好像删除语句是错误的？

Answer 1

做不到。它必须是三个单独的删除。

DELETE 
  FROM medewerkers
 WHERE mnr = p_mnr;

DELETE 
  FROM UITVOERINGEN 
 WHERE cursus = p_mnr;

DELETE 
  FROM UITVOERINGEN 
 WHERE docent = p_mnr;