这里是我用于类似目的的脚本。它不支持复合外键(它使用多个字段。)它可能需要一些调整，它将适合您的情况。编辑：特别是它不能正确处理多列外键。

select

DropStmt = 'ALTER TABLE [' + ForeignKeys.ForeignTableSchema +

'].[' + ForeignKeys.ForeignTableName +

'] DROP CONSTRAINT [' + ForeignKeys.ForeignKeyName + ']; '

, CreateStmt = 'ALTER TABLE [' + ForeignKeys.ForeignTableSchema +

'].[' + ForeignKeys.ForeignTableName +

'] WITH CHECK ADD CONSTRAINT [' + ForeignKeys.ForeignKeyName +

'] FOREIGN KEY([' + ForeignKeys.ForeignTableColumn +

']) REFERENCES [' + schema_name(sys.objects.schema_id) + '].[' +

sys.objects.[name] + ']([' +

sys.columns.[name] + ']) ON DELETE CASCADE; '

from sys.objects

inner join sys.columns

on (sys.columns.[object_id] = sys.objects.[object_id])

inner join (

select sys.foreign_keys.[name] as ForeignKeyName

,schema_name(sys.objects.schema_id) as ForeignTableSchema

,sys.objects.[name] as ForeignTableName

,sys.columns.[name] as ForeignTableColumn

,sys.foreign_keys.referenced_object_id as referenced_object_id

,sys.foreign_key_columns.referenced_column_id as referenced_column_id

from sys.foreign_keys

inner join sys.foreign_key_columns

on (sys.foreign_key_columns.constraint_object_id

= sys.foreign_keys.[object_id])

inner join sys.objects

on (sys.objects.[object_id]

= sys.foreign_keys.parent_object_id)

inner join sys.columns

on (sys.columns.[object_id]

= sys.objects.[object_id])

and (sys.columns.column_id

= sys.foreign_key_columns.parent_column_id)

) ForeignKeys

on (ForeignKeys.referenced_object_id = sys.objects.[object_id])

and (ForeignKeys.referenced_column_id = sys.columns.column_id)

where (sys.objects.[type] = 'U')

and (sys.objects.[name] not in ('sysdiagrams'))