Question

如果表中有一个外键，如何从表中删除？我有这个存储过程但是当我执行它时它会给我这个错误：The DELETE statement conflicted with the REFERENCE constraint "FK__Pilot_Fli__pilot__4E88ABD4". The conflict occurred in database "Airline Reservation", table "dbo.Pilot_Flight", column'pilot_id'。

create procedure DeletePilot
    (@id INTEGER,@result varchar(70) output)
as
    If NOT Exists ( Select * From Pilot
            Where pilot_id=@id) 
    Begin
        Set @result='There is no record with that ID'
        RETURN
    END

    Delete from Pilot
    where pilot_id=@id
    set @result='Record was deleted'
    RETURN
GO
select * from Pilot
Declare @res varchar(70)
EXEC DeletePilot 7,@res OUTPUT
print(@res)

任何人都可以帮助我！

Answer 1

您必须运行这样的语句（如果它是nullable）：

UPDATE Pilot_Flight
SET pilot_id = NULL
WHERE pilot_id = @id

或者这样做：

DELETE Pilot_Flight WHERE pilot_id = @id

无论哪种方式，您都必须在<{1}} DELETE之前之前执行之前的。

Answer 2

dbo.Pilot_Flight中有记录在dbo.Pilot中引用记录。

您可以删除Pilot_Flight中的记录，然后删除Pilot中的记录，启用（cascade delete，当Pilot记录被删除（坏）时会删除Pilot_Flight中的记录，或者禁用外键引用...（更差））。

从Sql Server中的表中删除行

2 个答案: