Question

我想在更新表后将一些结果存储在临时表中但是它给了我一个包含多个条目的类别/书籍类型的错误。当我尝试使用具有一个条目的书籍类型时，一切正常。有人可以告诉我如何解决这个问题，我认为它与没有过滤器有关，尽管我不确定如何做到这一点。

DROP PROCEDURE UpdateAdvance;
CREATE OR REPLACE PROCEDURE UpdateAdvance (
  p_BookType          titles.category%TYPE,
  p_NewAdvance        advance_temptable.new_advance%TYPE) AS
  CURSOR titles_cur IS
  SELECT *
  FROM titles
  WHERE category=p_BookType
  FOR UPDATE OF advance;
  titles_rec titles_cur%ROWTYPE;
  v_OldAdvance        titles.advance%TYPE;
  v_TitleID           titles.title_id%TYPE;
  v_Title             titles.title%TYPE;
BEGIN
  SELECT advance, title_id, title
    INTO v_OldAdvance, v_TitleID, v_Title
    FROM titles
    WHERE category=p_BookType;

  FOR titles_rec in titles_cur LOOP  
      INSERT INTO advance_temptable VALUES(advance_sequence.nextval, v_TitleID, v_Title, v_OldAdvance, p_NewAdvance);
            END LOOP; 
    COMMIT;
END UpdateAdvance;

当我这样称呼它时

BEGIN
  UpdateAdvance('psychology', 100);
END;

我收到错误：

Error starting at line : 35 in command -
BEGIN
  UpdateAdvance('psychology', 100);
END;
Error report -
ORA-01422: exact fetch returns more than requested number of rows
ORA-06512: at "SYSTEM.UPDATEADVANCE", line 14
ORA-06512: at line 2
01422. 00000 -  "exact fetch returns more than requested number of rows"
*Cause:    The number specified in exact fetch is less than the rows returned.
*Action:   Rewrite the query or change number of rows requested

应用解决方案，这就是我现在所做的工作。

DROP PROCEDURE UpdateAdvance;
CREATE OR REPLACE PROCEDURE UpdateAdvance (
  p_BookType          titles.category%TYPE,
  p_NewAdvance        advance_temptable.new_advance%TYPE) AS
BEGIN
  INSERT INTO advance_temptable 
  select advance_sequence.nextval, title_id, title, advance, p_NewAdvance
  FROM titles
  WHERE category=p_BookType;
    COMMIT;
END UpdateAdvance;

BEGIN
  UpdateAdvance('psychology', 100);
END;

Answer 1

你为什么不这样做：

INSERT INTO advance_temptable 
  select advance_sequence.nextval, TitleID, Title, Advance, p_NewAdvance
  FROM titles
  WHERE category = p_BookType;

没有光标？

PL / SQL错误返回多行

1 个答案: