Xóa dữ liệu khỏi các bảng phụ thuộc

Như có có các mối quan hệ khóa ngoài, tập lệnh sau có thể giúp bạn bắt đầu bắt chước thao tác xóa theo tầng.

DECLARE @TableName VARCHAR(32)
DECLARE @PrimaryKey VARCHAR(32)

SET @TableName = 'MasterTable'
SET @PrimaryKey = '1'

SELECT  'DELETE FROM '
        + fks.name + '.' + fkt.name
        + ' WHERE '
        + pc.name 
        + ' = '
        + @PrimaryKey
        , fko.name as [FK Name]
        , fk.constraint_column_id as [Col Order]
        , fks.name + '.' + fkt.name as [FK table]
        , pc.name as [FK column]
        , rcs.name + '.' + rct.name as [PK table]
        , rc.name as [PK column]
FROM    sys.foreign_key_columns fk
        -- FK columns
        INNER JOIN sys.columns pc ON fk.parent_object_id = pc.object_id
                                     AND fk.parent_column_id = pc.column_id
        INNER JOIN sys.objects fkt ON pc.object_id = fkt.object_id
        INNER JOIN sys.schemas as fks ON fks.schema_id = fkt.schema_id
        -- referenced PK columns
        INNER JOIN sys.columns rc ON fk.referenced_object_id = rc.object_id
                                     AND fk.referenced_column_id = rc.column_id
        INNER JOIN sys.objects rct ON rc.object_id = rct.object_id
        INNER JOIN sys.schemas as rcs ON rcs.schema_id = rct.schema_id
        -- foreign key constraint name
        INNER JOIN sys.objects fko ON fk.constraint_object_id = fko.object_id
WHERE   rct.Name = @TableName