sql 创建用于查找外键约束的脚本，并通过删除和创建外部约束来重建它们。

Posted 2021-05-13

DECLARE @tableName NVARCHAR(500)
SET @tableName='_Neighborhood'
SELECT
    fk.name,
    object_name(fk.parent_object_id) 'Parent table',
    c1.name 'Parent column',
    object_name(fk.referenced_object_id) 'Referenced table',
    c2.name 'Referenced column',
	'ALTER TABLE dbo.' + object_name(fk.parent_object_id) + 
    ' DROP CONSTRAINT [' + fk.name+']',
	'ALTER TABLE dbo.' + object_name(fk.parent_object_id) + 
    ' ADD CONSTRAINT [' + fk.name +
    '] FOREIGN KEY(' + c1.name + ') REFERENCES dbo.' + 
    object_name(fk.referenced_object_id) + '(' + c2.name + ')'
from 
    sys.foreign_keys fk
inner join
    sys.foreign_key_columns fkc ON fk.object_id = fkc.constraint_object_id
inner join
    sys.columns c1 ON fkc.parent_column_id = c1.column_id and c1.object_id = fkc.parent_object_id
inner join
    sys.columns c2 ON fkc.referenced_column_id = c2.column_id and c2.object_id = fkc.referenced_object_id
	WHERE object_name(fk.referenced_object_id)=@tableName