我知道這是舊的,但這將編寫出所有FK掉落,PK掉落,pk重新創建,FK重新創建。 用你的表名替換MYTABLE。
IF EXISTS (SELECT * FROM sys.tables WHERE object_id = OBJECT_ID(N'[dbo].[FKAgainstTableList]'))
BEGIN
DROP TABLE FKAgainstTableList
END
--CREATE TABLE FKAgainstTableList (ForeignKey VARCHAR(30),[Table] VARCHAR(30))
DECLARE @PKTableName VARCHAR(100),
@PKName varchar(100),
@FKName varchar(100),
@sql varchar(max),
@PKcolumnName varchar(30),
@table VARCHAR(100),
@FKColumnName VARCHAR(100),
@parentColumnNumber int
SET @PKTableName = 'MYTABLE'
set @PKName = (SELECT name FROM sys.indexes WHERE OBJECT_NAME(object_id) = @PKTableName AND is_primary_key = 1)
set @PKcolumnName = (SELECT name FROM sys.columns WHERE OBJECT_NAME(object_id) = @PKTableName AND is_identity =1)
PRINT @PKcolumnName
SELECT OBJECT_NAME(sys.foreign_key_columns.parent_object_id) [Table],sys.columns.name [FKColumnName],sys.foreign_keys.name [FKName]
INTO FKAgainstTableList
FROM sys.foreign_keys INNER JOIN sys.foreign_key_columns
ON sys.foreign_keys.object_id = sys.foreign_key_columns.constraint_object_id
INNER JOIN sys.columns ON sys.columns.object_id = sys.foreign_keys.parent_object_id AND sys.columns.column_id = sys.foreign_key_columns.parent_column_id
WHERE OBJECT_NAME(sys.foreign_keys.referenced_object_id) = @PKTableName
DECLARE table_cur1 CURSOR FOR
SELECT * FROM FKAgainstTableList
PRINT @sql
-------------------------------Disable constraint on FK Tables
OPEN table_cur1
FETCH NEXT FROM table_cur1 INTO @table,@FKColumnName,@FKName
WHILE @@FETCH_STATUS = 0
BEGIN
SET @sql ='ALTER TABLE '[email protected]+' DROP CONSTRAINT '+ @FKName
PRINT @sql
FETCH NEXT FROM table_cur1 INTO @table,@FKColumnName,@FKName
END
CLOSE table_cur1
DEALLOCATE table_cur1
--------------------------------DROP AND recreate CLUSTERED pk
IF EXISTS (SELECT 1 FROM sys.indexes WHERE object_id = OBJECT_ID(@PKTableName) AND name = @PKName)
BEGIN
SET @sql = 'ALTER TABLE '[email protected]+' DROP CONSTRAINT '+ @PKName
PRINT @sql
END
SET @sql = 'ALTER TABLE '[email protected] +' ADD CONSTRAINT '[email protected]+' PRIMARY KEY CLUSTERED ('[email protected]+' ASC)
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 80) ON [PRIMARY]'
PRINT(@sql)
--------------------------------Enable FK constraints on FK tables.
DECLARE table_cur2 CURSOR FOR
SELECT * FROM FKAgainstTableList
OPEN table_cur2
FETCH NEXT FROM table_cur2 INTO @table,@FKColumnName,@FKName
WHILE @@FETCH_STATUS = 0
BEGIN
SET @sql = 'ALTER TABLE '[email protected]+' WITH NOCHECK ADD CONSTRAINT '+ @FKName+' FOREIGN KEY(['[email protected]+'])
REFERENCES ['[email protected]+'] (['[email protected]+'])'
PRINT(@sql)
SET @sql = 'ALTER TABLE '[email protected]+' CHECK CONSTRAINT '[email protected]
PRINT(@sql)
FETCH NEXT FROM table_cur2 INTO @table,@FKColumnName,@FKName
END
CLOSE table_cur2
DEALLOCATE table_cur2
DROP TABLE FKAgainstTableList
爲什麼要在主鍵上進行集羣?它是一個GUID還是INT?大部分查詢是否包含匹配PK? – awright18 2010-02-20 01:23:44
@ awright18 - 聚集的PK提供了更好的性能,它實際上是在最常被查詢的2個int字段上的複合主鍵 – AdaTheDev 2010-02-20 11:08:16