从依赖表中删除数据

Question

在SQL Server 2008中是否有一个查询,它将删除所有相关表中的数据以及所选表？

对于没有详细阐述这个问题我表示歉意.我知道Cascade Delete可以正常工作,但我的应用程序连接到第三方SQL Server数据库.我有一些单元测试插入到目标表和从属表中.不幸的是,目标表上的约束不是On Delete Cascade,我无法创建它们或创建它们.我正在寻找一种遍历依赖关系并以正确顺序删除数据的通用方法.

Answer 1

因为有外键关系,下面的脚本可以让你开始模仿级联删除.

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