외래키 제약 조건 삭제 후 재작성 스크립트 생성하기

외래키 제약 조건 삭제 후 재작성 스크립트 생성하기

 

• Version : SQL Server 2005, 2008, 2008R2, 2012, 2014

 

외래키 삭제 후 재작성 하는 스크립트를 생성하는 스크립트이다. SSMS 기능에도 스크립트 생성 기능은 있지만 스키마 또는 데이터 및 스키마, 데이터만 가능하다. 아래 스크립트는 외래키만 삭제, 생성하는 쿼리문을 만들어 제공한다.

 

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; */

 

 

 

 

[참고자료]

http://www.mssqltips.com/sqlservertip/3347/drop-and-recreate-all-foreign-key-constraints-in-sql-server/

 

2014-10-13 / 강성욱 / http://sqlmvp.kr.

 

Sqlserver, 외래키 작성, foreign key, DBA, DB관리, 데이터베이스 관리, mssql, sql2012, 제약조건,