Question

如何在SQL Server中复制表（包括PK＆amp; FK），我试过这个：

SELECT TOP 0 * INTO new_table FROM old_table

但它不起作用，只是复制columns而没有Primary Key/Foreign Key

Answer 1

我已在我的工作环境中编写了一个脚本来执行此操作

这将基于现有表

在新表上创建以下对象

DEFAULT Constraint
PRIMARY KEY Constraint
UNIQUE Constraint
FOREIGN KEY Constraint

使用INTO子句创建的表将不会在新表

<强>脚本：

IF Object_id('TEMPDB..#TABLE_LIST') IS NOT NULL
    DROP TABLE #TABLE_LIST

CREATE TABLE #TABLE_LIST
    (
        ORG_TABLE_NAME  SYSNAME,
        TEMP_TABLE_NAME SYSNAME
    )

INSERT INTO #TABLE_LIST
            (ORG_TABLE_NAME,
                TEMP_TABLE_NAME)
Values('old_table','new_table')


-------------------------------------------------DEFAULT SCRIPT START---------------------------------------------------
DECLARE @DEFAULT_SCRIPT VARCHAR(MAX) =''

SET @DEFAULT_SCRIPT = (SELECT 'ALTER TABLE ['+SCHEMA_NAME(SCHEMA_ID)+'].['+TL.TEMP_TABLE_NAME+']
                                                        ADD CONSTRAINT ['+replace(DC.NAME,tl.ORG_TABLE_NAME,tl.TEMP_TABLE_NAME)+'] DEFAULT '+DEFINITION+' FOR ['+C.NAME+']

                                        '
FROM SYS.DEFAULT_CONSTRAINTS DC INNER JOIN SYS.COLUMNS C ON DC.PARENT_OBJECT_ID = C.OBJECT_ID
AND DC.PARENT_COLUMN_ID = C.COLUMN_ID
join #TABLE_LIST TL on OBJECT_ID(TL.ORG_TABLE_NAME) = PARENT_OBJECT_ID)

--print @DEFAULT_SCRIPT
EXEC (@DEFAULT_SCRIPT)


-------------------------------------------------DEFAULT SCRIPT END---------------------------------------------------

-------------------------------------------------PRIMARY SCRIPT START---------------------------------------------------
DECLARE @PRIMARY_SCRIPT VARCHAR(MAX) =''

SET @PRIMARY_SCRIPT = (SELECT 'ALTER TABLE ['+TL.TEMP_TABLE_NAME+']
                                                ADD CONSTRAINT ['+replace(TAB.CONSTRAINT_NAME,tl.ORG_TABLE_NAME,tl.TEMP_TABLE_NAME) +'] PRIMARY KEY ('+LEFT(CS.COL_LIST, LEN(CS.COL_LIST) - 1)+')

                                                '
FROM   INFORMATION_SCHEMA.TABLE_CONSTRAINTS TAB
JOIN  #TABLE_LIST TL on TL.ORG_TABLE_NAME = TAB.TABLE_NAME
        CROSS APPLY (SELECT QUOTENAME(COLUMN_NAME) + ','
                                FROM   INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE COL
                                WHERE  COL.CONSTRAINT_NAME = TAB.CONSTRAINT_NAME
                                            AND COL.TABLE_NAME = TAB.TABLE_NAME
                                FOR XML PATH('')) CS (COL_LIST)
WHERE  CONSTRAINT_TYPE = 'PRIMARY KEY'
GROUP  BY TAB.TABLE_NAME,
                TAB.CONSTRAINT_NAME,
                CONSTRAINT_SCHEMA,tl.ORG_TABLE_NAME,tl.TEMP_TABLE_NAME,
                LEFT(CS.COL_LIST, LEN(CS.COL_LIST) - 1))

--print @PRIMARY_SCRIPT
EXEC (@PRIMARY_SCRIPT)

-------------------------------------------------PRIMARY SCRIPT END---------------------------------------------------


-------------------------------------------------UNIQUE CONSTARINT SCRIPT START---------------------------------------------------
DECLARE @UNIQUE_SCRIPT VARCHAR(MAX) =''

SET @UNIQUE_SCRIPT = (SELECT 'ALTER TABLE ['+TL.TEMP_TABLE_NAME+']
                                                ADD CONSTRAINT ['+replace(TAB.CONSTRAINT_NAME,tl.ORG_TABLE_NAME,tl.TEMP_TABLE_NAME)+'] UNIQUE ('+LEFT(CS.COL_LIST, LEN(CS.COL_LIST) - 1)+')

                                                '
FROM   INFORMATION_SCHEMA.TABLE_CONSTRAINTS TAB
        JOIN  #TABLE_LIST TL on TL.ORG_TABLE_NAME = TAB.TABLE_NAME
        CROSS APPLY (SELECT QUOTENAME(COLUMN_NAME) + ','
                                FROM   INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE COL
                                WHERE  COL.CONSTRAINT_NAME = TAB.CONSTRAINT_NAME
                                            AND COL.TABLE_NAME = TAB.TABLE_NAME
                                FOR XML PATH('')) CS (COL_LIST)
WHERE  CONSTRAINT_TYPE = 'UNIQUE'
GROUP  BY TAB.TABLE_NAME,
                TAB.CONSTRAINT_NAME,
                CONSTRAINT_SCHEMA,tl.ORG_TABLE_NAME,tl.TEMP_TABLE_NAME,
                LEFT(CS.COL_LIST, LEN(CS.COL_LIST) - 1))


EXEC (@UNIQUE_SCRIPT)

-------------------------------------------------UNIQUE CONSTARINT SCRIPT END---------------------------------------------------

-------------------------------------------------FOREIGN KEY SCRIPT START---------------------------------------------------
DECLARE @FOREIGNKEY_SCRIPT VARCHAR(MAX) = ''

SET @FOREIGNKEY_SCRIPT = (SELECT 'ALTER TABLE ['+TL.TEMP_TABLE_NAME+']
                                                ADD CONSTRAINT '+replace(F.NAME,tl.ORG_TABLE_NAME,tl.TEMP_TABLE_NAME)+' FOREIGN KEY('+QUOTENAME(COL_NAME(FC.PARENT_OBJECT_ID, FC.PARENT_COLUMN_ID))+') REFERENCES '+OBJECT_NAME (F.REFERENCED_OBJECT_ID)+'('+QUOTENAME(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
                        INNER JOIN  #TABLE_LIST TL on TL.ORG_TABLE_NAME = OBJECT_NAME(F.PARENT_OBJECT_ID))

EXEC (@FOREIGNKEY_SCRIPT)

注意：

我没有处理schema因此脚本认为只有dbo架构
如果不需要任何constraint，您可以在脚本中注释或删除它。

如何在SQL Server中复制表（包括PK＆amp; FK）

1 个答案: