Comment dupliquer une table dans SQL Server (inclure PK &FK)

J'ai écrit un script dans mon environnement de travail pour faire cela

Cela créera les objets suivants sur la nouvelle table basée sur la table existante

1. Contrainte DEFAULT
2. Contrainte de CLÉ PRIMAIRE
3. Contrainte UNIQUE
4. Contrainte de CLÉ ÉTRANGÈRE

Les tables créées avec INTO la clause n'aura pas les objets ci-dessus créés dans la nouvelle table

Scénario :

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)

Remarque :

1. Je n'ai pas géré le schema donc le script considère qu'il n'y a qu'un schéma dbo
2. Le cas échéant, constraint n'est pas nécessaire, vous pouvez le commenter ou le supprimer du script.