Question

我有以下表格：Persons，Person_Categories和Persons_PersonCategories，它们是n：m关系的链接表。

我还编写了以下查询，但insert语句无法正常工作。插入，更新和删除是单独的语句。我得到的错误消息是“列数与第1行的值计数不匹配”

SELECT Persons_PersonCategories.PersonID, PrsCategory
FROM Person_Categories
INNER JOIN Persons_PersonCategories
ON Persons_PersonCategories.PrsCatID = Person_Categories.PrsCatID

INSERT INTO Persons_PersonCategories
VALUES (:PrsCategory)

UPDATE Persons_PersonCategories
SET Persons_PersonCategories.PrsCatID = :PrsCatID
WHERE Person_Categories.PrsCatID = :OLD PrsCatID
AND Persons.PersonID = :OLD PersonID

DELETE FROM Persons_PersonCategories
WHERE Person_Categories.PrsCatID = :PrsCatID
AND Persons.PersonID = :PersonID;

任何帮助将不胜感激，咱

Answer 1

指定要更新的列：

INSERT INTO Persons_PersonCategories (PrsCategory) VALUES (:PrsCategory)

如果我没有正确猜到你正在尝试做什么，请用正确的列名代替PrsCategory。

Answer 2

看起来您需要添加PersonID

INSERT INTO Persons_PersonCategories(PersonID, PrsCatID)
VALUES (:PersonID, :PrsCatID)

在查询中插入，更新，删除语句

2 个答案: