我有下面的脚本,这给了我一个错误: “ INSERT语句与FOREIGN KEY约束“ FK_dbo.PlanShiftAssignments_dbo.User_UserId”发生冲突。冲突发生在数据库“ SWS”的表“ dbo.User”的“ Id”列中。 该语句已终止。”
如您所见,在WHERE子句中,我检查dbo.User中是否存在UserId。错误的其他可能原因是什么?
更新:我还想知道select语句中的哪一行导致错误。在调试此查询的任何建议将不胜感激。我正在使用MS SQL Server Management Studio。
CREATE TABLE [dbo].[PlanShiftAssignments] (
[PlanShiftId] [uniqueidentifier] NOT NULL,
[Status] [int] NOT NULL,
[UserId] [int],
CONSTRAINT [PK_dbo.PlanShiftAssignments] PRIMARY KEY ([PlanShiftId])
)
CREATE INDEX [IX_PlanShiftId] ON [dbo].[PlanShiftAssignments]([PlanShiftId])
CREATE INDEX [IX_UserId] ON [dbo].[PlanShiftAssignments]([UserId])
ALTER TABLE [dbo].[PlanShiftAssignments] ADD CONSTRAINT [FK_dbo.PlanShiftAssignments_dbo.PlanShifts_PlanShiftId] FOREIGN KEY ([PlanShiftId]) REFERENCES [dbo].[PlanShifts] ([Id])
ALTER TABLE [dbo].[PlanShiftAssignments] ADD CONSTRAINT [FK_dbo.PlanShiftAssignments_dbo.User_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[User] ([Id])
insert into dbo.PlanShiftAssignments
select ps.Id as PlanShiftId, ISNULL(ps.AssigneeId, psi.UserId) as UserId, ISNULL(psi.[Status], 1) as [Status] from dbo.PlanShifts ps
left join
dbo.PlanShiftInvitations psi
on ps.Id = psi.PlanShiftId
where (psi.UserId is not null and psi.UserId IN (select Id from dbo.[User]))
or (ps.AssigneeId is not null and ps.AssigneeId IN (select Id from dbo.[User]))
答案 0 :(得分:3)
确保您始终始终在每个INSERT
语句中包含目标的列列表。
insert into dbo.PlanShiftAssignments (
PlanShiftId,
UserId,
Status)
SELECT
ps.Id as PlanShiftId,
ISNULL(ps.AssigneeId, psi.UserId) as UserId,
ISNULL(psi.[Status], 1) as [Status]
...
您的表的创建顺序为PlanShiftId, Status, UserId
,而当前SELECT
的列顺序为PlanShiftId, UserId, Status
,因此很混乱。
答案 1 :(得分:1)
如果UserId
和AssigneeId
在基础表中尚未引用User
,则您有一个奇怪的数据模型。
无论如何,您的where
子句是
where (psi.UserId is not null and psi.UserId IN (select Id from dbo.[User])) or
(ps.AssigneeId is not null and ps.AssigneeId IN (select Id from dbo.[User]))
这打开了psi.UserId
匹配但ps.AssigneeId
不匹配的可能性。
为确保逻辑匹配,请使用与select
中相同的表达式:
where coalesce(ps.AssigneeId, psi.UserId) in (select Id from dbo.[User])
答案 2 :(得分:0)
是否可能是因为您在WHERE子句中指定了OR,所以AssigneeId或UserId不在User表中,所以不在另一个表中,因此使FK约束无效。