CREATE TABLE #x -- feel free to use a permanent table

(

drop_script NVARCHAR(MAX),

create_script NVARCHAR(MAX)

);

DECLARE @drop NVARCHAR(MAX) = N'',

@create NVARCHAR(MAX) = N'';

-- drop is easy, just build a simple concatenated list from sys.foreign_keys:

SELECT @drop += N'

ALTER TABLE ' + QUOTENAME(cs.name) + '.' + QUOTENAME(ct.name)

+ ' DROP CONSTRAINT ' + QUOTENAME(fk.name) + ';'

FROM sys.foreign_keys AS fk

INNER JOIN sys.tables AS ct

ON fk.parent_object_id = ct.[object_id]

INNER JOIN sys.schemas AS cs

ON ct.[schema_id] = cs.[schema_id];

INSERT #x(drop_script) SELECT @drop;

-- create is a little more complex. We need to generate the list of

-- columns on both sides of the constraint, even though in most cases

-- there is only one column.

SELECT @create += N'

ALTER TABLE '

+ QUOTENAME(cs.name) + '.' + QUOTENAME(ct.name)

+ ' ADD CONSTRAINT ' + QUOTENAME(fk.name)

+ ' FOREIGN KEY (' + STUFF((SELECT ',' + QUOTENAME(c.name)

-- get all the columns in the constraint table

FROM sys.columns AS c

INNER JOIN sys.foreign_key_columns AS fkc

ON fkc.parent_column_id = c.column_id

AND fkc.parent_object_id = c.[object_id]

WHERE fkc.constraint_object_id = fk.[object_id]

ORDER BY fkc.constraint_column_id

FOR XML PATH(N''), TYPE).value(N'.[1]', N'nvarchar(max)'), 1, 1, N'')

+ ') REFERENCES ' + QUOTENAME(rs.name) + '.' + QUOTENAME(rt.name)

+ '(' + STUFF((SELECT ',' + QUOTENAME(c.name)

-- get all the referenced columns

FROM sys.columns AS c

INNER JOIN sys.foreign_key_columns AS fkc

ON fkc.referenced_column_id = c.column_id

AND fkc.referenced_object_id = c.[object_id]

WHERE fkc.constraint_object_id = fk.[object_id]

ORDER BY fkc.constraint_column_id

FOR XML PATH(N''), TYPE).value(N'.[1]', N'nvarchar(max)'), 1, 1, N'') + ');'

FROM sys.foreign_keys AS fk

INNER JOIN sys.tables AS rt -- referenced table

ON fk.referenced_object_id = rt.[object_id]

INNER JOIN sys.schemas AS rs

ON rt.[schema_id] = rs.[schema_id]

INNER JOIN sys.tables AS ct -- constraint table

ON fk.parent_object_id = ct.[object_id]

INNER JOIN sys.schemas AS cs

ON ct.[schema_id] = cs.[schema_id]

WHERE rt.is_ms_shipped = 0 AND ct.is_ms_shipped = 0;

UPDATE #x SET create_script = @create;

PRINT @drop;

PRINT @create;

/*

EXEC sp_executesql @drop

-- clear out data etc. here

EXEC sp_executesql @create;

*/