由于缺少外键而出现孤立行

Question

我在生产中缺少复合外键，并且在尝试创建时出现错误“更改表与外键约束冲突”。

下面是我们试图执行的语句。

ALTER TABLE dbo.tbl_ComputationWebsheetCellData WITH CHECK ADD CONSTRAINT [FK_tbl_ComputationWebsheetCellData_tbl_ComputationWebsheetCell] 
        FOREIGN KEY (ComputationID, CustomScheduleID, AccountGUID, ColumnGUID) 
        REFERENCES [tbl_ComputationWebsheetCell] (ComputationID, CustomScheduleID, AccountGUID, ColumnGUID)

以下是表格详情：

tbl_ComputationWebsheetCellData

--PK_tbl_ComputationWebsheetCellData (ComputationID, CustomScheduleID, AccountGUID, ColumnGUID) --FK_tbl_ComputationWebsheetCellData_tbl_ComputationWebsheetCell 参考 dbo.tbl_ComputationWebsheetCell (ComputationID, CustomScheduleID, AccountGUID, ColumnGUID) tbl_ComputationWebsheetCell

--PK_tbl_ComputationWebsheetCell (ComputationID, CustomScheduleID, AccountGUID, ColumnGUID)

下面的脚本会给出孤立的行吗？

select top 10 celldata.*
 from tbl_ComputationWebsheetCellData (nolock) celldata
 left join tbl_ComputationWebsheetCell(nolock) cell
 On celldata.ComputationID = cell.ComputationID
 and celldata.CustomScheduleID = cell.CustomScheduleID
 and celldata.AccountGUID = cell.AccountGUID
 and celldata.ColumnGUID = cell.ColumnGUID
 where cell.ComputationID IS NULL
 and cell.CustomScheduleID IS NULL
 and cell.AccountGUID Is NULL
 and cell.ColumnGUID IS NULL