SELECT 'ALTER TABLE ' + OBJECT_NAME(f.parent_object_id) + ' DROP CONSTRAINT [' + f.name + ']'
FROM sys.foreign_keys AS f
INNER JOIN sys.foreign_key_columns AS fc
ON f.OBJECT_ID = fc.constraint_object_id
UNION ALL
SELECT 'TRUNCATE TABLE ' + name FROM dbo.sysobjects WHERE (type = 'u') and name != 'sysdiagrams'
UNION ALL
SELECT 'ALTER TABLE ' + OBJECT_NAME(f.parent_object_id) + ' ADD CONSTRAINT ' + f.name + ' FOREIGN KEY (' + COL_NAME(fc.parent_object_id, fc.parent_column_id) + ') REFERENCES ' + OBJECT_NAME (f.referenced_object_id) + '(' + COL_NAME(fc.referenced_object_id, fc.referenced_column_id) + ')' FROM sys.foreign_keys AS f INNER JOIN sys.foreign_key_columns AS fc ON f.OBJECT_ID = fc.constraint_object_id