Question

我有一组表（SQL Server 2014），我需要手动执行删除级联。我有这三个表：

CREATE TABLE dbo.A
(
    IdKey int identity primary Key,
    Name nvarchar(50)
)

CREATE TABLE dbo.B
(
    Id int identity primary Key,
    ChildIdKey int,
    Name nvarchar(50)
)

CREATE TABLE dbo.C
(
    Id int identity primary Key,
    OtherIdKey int,
    Name nvarchar(50)
)

如果我需要从表A中删除IdKey，我首先需要识别表A上指向IdKey的外键。我在表B上有一个基于ChildIdKey的FK，另一个在表C上有另一个在FK上的OtherIdKey上。列名是不同所以现在我需要得到所有表格，我有一个FK指向IdKey并手动执行删除级联，以避免FK错误。

如何以正确的顺序获取表格列表以手动执行级联删除？

Answer 1

尝试根据some-table

的特定列找出所有表

DECLARE @ColumnName sysname,@TableName sysname
SET @ColumnName='userId'
SET @TableName='user'  


SELECT  Fkn.name FKName ,
cname.name FKColumnName,
        FCT.name FKContainingTable ,
        CCT.name ColumnContainingTable
FROM    sys.foreign_key_columns Fk
INNER JOIN sys.foreign_keys fkn ON fkn.object_id=fk.constraint_object_id
        INNER JOIN sys.tables FCT ON fCt.object_id = fk.parent_object_id
        INNER JOIN sys.tables CCT ON fk.referenced_object_id = CCT.object_id
        INNER JOIN sys.columns CLM ON CCT.object_id = clm.object_id
INNER JOIN sys.columns CName ON CName.object_id=fk.parent_object_id AND CName.column_id=fk.parent_column_id
                                      AND CLM.name = @ColumnName 
                                      AND cct.name = @TableName

在SQL Server

1 个答案: