Como excluir todas as linhas de todas as tabelas em um banco de dados do SQL Server?
Como excluir todas as linhas de todas as tabelas em um banco de dados do SQL Server?
Respostas:
Observe que TRUNCATE não funcionará se você tiver qualquer integridade referencial definida.
Nesse caso, isso funcionará:
EXEC sp_MSForEachTable 'DISABLE TRIGGER ALL ON ?'
GO
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'
GO
EXEC sp_MSForEachTable 'DELETE FROM ?'
GO
EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL'
GO
EXEC sp_MSForEachTable 'ENABLE TRIGGER ALL ON ?'
GO
USE [MyDataBase]
:? A idéia acima funcionaria, se adaptada de alguma forma? ... Porque eu não quero excluir todos os bancos de dados mantidos pelo servidor SQL.
Em meu projeto recente, minha tarefa era limpar um banco de dados inteiro usando a instrução sql e cada tabela com muitas restrições, como Chave Primária e Chave Estrangeira. Existem mais de 1000 tabelas no banco de dados, portanto, não é possível gravar uma consulta de exclusão em cada tabela.
Usando um procedimento armazenado chamado sp_MSForEachTable, que permite processar facilmente algum código em todas as tabelas em um único banco de dados. Isso significa que é usado para processar um único comando T-SQL ou um comando T-SQL diferente em todas as tabelas do banco de dados.
Portanto, siga as etapas abaixo para truncar todas as tabelas em um banco de dados do SQL Server:
Etapa 1 - Desative todas as restrições no banco de dados usando a consulta sql abaixo:
EXEC sys.sp_msforeachtable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'
Etapa 2- Execute uma operação Excluir ou truncar em cada tabela do banco de dados usando o comando sql abaixo:
EXEC sys.sp_msforeachtable 'DELETE FROM ?'
Etapa 3- Habilite todas as restrições no banco de dados usando a instrução sql abaixo:
EXEC sys.sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL'
sql server azure
?
Eu tive que excluir todas as linhas e fiz isso com o próximo script:
DECLARE @Nombre NVARCHAR(MAX);
DECLARE curso CURSOR FAST_FORWARD
FOR
Select Object_name(object_id) AS Nombre from sys.objects where type = 'U'
OPEN curso
FETCH NEXT FROM curso INTO @Nombre
WHILE (@@FETCH_STATUS <> -1)
BEGIN
IF (@@FETCH_STATUS <> -2)
BEGIN
DECLARE @statement NVARCHAR(200);
SET @statement = 'DELETE FROM ' + @Nombre;
print @statement
execute sp_executesql @statement;
END
FETCH NEXT FROM curso INTO @Nombre
END
CLOSE curso
DEALLOCATE curso
Espero que isto ajude!
Aqui está uma solução que:
INFORMATION_SCHEMA.TABLES
para um banco de dados específicoSELECTS
tabelas com base em alguns critérios de pesquisasysdiagrams
e__RefactorLog
Inicialmente EXECUTE sp_MSforeachtable 'TRUNCATE TABLE ?'
, tentei , mas isso excluiu meus diagramas.
USE <DB name>;
GO
-- Disable all constraints in the database
EXEC sp_msforeachtable "ALTER TABLE ? NOCHECK CONSTRAINT all"
declare @catalog nvarchar(250);
declare @schema nvarchar(250);
declare @tbl nvarchar(250);
DECLARE i CURSOR LOCAL FAST_FORWARD FOR select
TABLE_CATALOG,
TABLE_SCHEMA,
TABLE_NAME
from INFORMATION_SCHEMA.TABLES
where
TABLE_TYPE = 'BASE TABLE'
AND TABLE_NAME != 'sysdiagrams'
AND TABLE_NAME != '__RefactorLog'
OPEN i;
FETCH NEXT FROM i INTO @catalog, @schema, @tbl;
WHILE @@FETCH_STATUS = 0
BEGIN
DECLARE @sql NVARCHAR(MAX) = N'DELETE FROM [' + @catalog + '].[' + @schema + '].[' + @tbl + '];'
/* Make sure these are the commands you want to execute before executing */
PRINT 'Executing statement: ' + @sql
-- EXECUTE sp_executesql @sql
FETCH NEXT FROM i INTO @catalog, @schema, @tbl;
END
CLOSE i;
DEALLOCATE i;
-- Re-enable all constraints again
EXEC sp_msforeachtable "ALTER TABLE ? WITH CHECK CHECK CONSTRAINT all"
ALTER TABLE
bit para desativar as restrições falha.
No meu caso, eu precisava ativar QUOTED_IDENTIFIER. Isso levou a uma ligeira modificação na resposta de Mark Rendle acima:
EXEC sp_MSForEachTable 'DISABLE TRIGGER ALL ON ?'
GO
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'
GO
EXEC sp_MSForEachTable 'SET QUOTED_IDENTIFIER ON; DELETE FROM ?'
GO
EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL'
GO
EXEC sp_MSForEachTable 'ENABLE TRIGGER ALL ON ?'
GO
DELETE failed because the following SET options have incorrect settings: 'QUOTED_IDENTIFIER'. Verify that SET options are correct for use with indexed views and/or indexes on computed columns and/or filtered indexes and/or query notifications and/or XML data type methods and/or spatial index operations.
Set nocount on
Exec sp_MSForEachTable 'Alter Table ? NoCheck Constraint All'
Exec sp_MSForEachTable
'
If ObjectProperty(Object_ID(''?''), ''TableHasForeignRef'')=1
Begin
-- Just to know what all table used delete syntax.
Print ''Delete from '' + ''?''
Delete From ?
End
Else
Begin
-- Just to know what all table used Truncate syntax.
Print ''Truncate Table '' + ''?''
Truncate Table ?
End
'
Exec sp_MSForEachTable 'Alter Table ? Check Constraint All'
Você pode excluir todas as linhas de todas as tabelas usando uma abordagem como sugerida por Rubens, ou simplesmente soltar e recriar todas as tabelas. Sempre é uma boa idéia ter os scripts de criação de banco de dados completos de qualquer maneira, para que esse seja o método mais fácil / rápido.
Para alguns requisitos, podemos ter que pular determinadas tabelas. Eu escrevi o script abaixo para adicionar algumas condições extras para filtrar a lista de tabelas. O script abaixo também exibirá a contagem de pré-exclusão e a contagem de pós-exclusão.
IF OBJECT_ID('TEMPDB..#TEMPRECORDCOUNT') IS NOT NULL
DROP TABLE #TEMPRECORDCOUNT
CREATE TABLE #TEMPRECORDCOUNT
( TABLENAME NVARCHAR(128)
,PREDELETECOUNT BIGINT
,POSTDELETECOUNT BIGINT
)
INSERT INTO #TEMPRECORDCOUNT (TABLENAME, PREDELETECOUNT, POSTDELETECOUNT)
SELECT O.name TableName
,DDPS.ROW_COUNT PREDELETECOUNT
,NULL FROM sys.objects O
INNER JOIN (
SELECT OBJECT_ID, SUM(row_count) ROW_COUNT
FROM SYS.DM_DB_PARTITION_STATS
GROUP BY OBJECT_ID
) DDPS ON DDPS.OBJECT_ID = O.OBJECT_ID
WHERE O.type = 'U' AND O.name NOT LIKE 'OC%' AND O.schema_id = 1
DECLARE @TableName NVARCHAR(MAX);
DECLARE TableDeleteCursor CURSOR FAST_FORWARD
FOR
SELECT TableName from #TEMPRECORDCOUNT
OPEN TableDeleteCursor
FETCH NEXT FROM TableDeleteCursor INTO @TableName
WHILE (@@FETCH_STATUS <> -1)
BEGIN
IF (@@FETCH_STATUS <> -2)
BEGIN
DECLARE @STATEMENT NVARCHAR(MAX);
SET @STATEMENT = ' DISABLE TRIGGER ALL ON ' + @TableName +
'; ALTER TABLE ' + @TableName + ' NOCHECK CONSTRAINT ALL' +
'; DELETE FROM ' + @TableName +
'; ALTER TABLE ' + @TableName + ' CHECK CONSTRAINT ALL' +
'; ENABLE TRIGGER ALL ON ' + @TableName;
PRINT @STATEMENT
EXECUTE SP_EXECUTESQL @STATEMENT;
END
FETCH NEXT FROM TableDeleteCursor INTO @TableName
END
CLOSE TableDeleteCursor
DEALLOCATE TableDeleteCursor
UPDATE T
SET T.POSTDELETECOUNT = I.ROW_COUNT
FROM #TEMPRECORDCOUNT T
INNER JOIN (
SELECT O.name TableName, DDPS.ROW_COUNT ROW_COUNT
FROM sys.objects O
INNER JOIN (
SELECT OBJECT_ID, SUM(row_count) ROW_COUNT
FROM SYS.DM_DB_PARTITION_STATS
GROUP BY OBJECT_ID
) DDPS ON DDPS.OBJECT_ID = O.OBJECT_ID
WHERE O.type = 'U' AND O.name NOT LIKE 'OC%' AND O.schema_id = 1
) I ON I.TableName COLLATE DATABASE_DEFAULT = T.TABLENAME
SELECT * FROM #TEMPRECORDCOUNT
ORDER BY TABLENAME ASC
Essa resposta se baseia na resposta de Zach Smith, redefinindo a coluna de identidade também:
Aqui está a consulta:
-- Disable all constraints in the database
EXEC sp_msforeachtable "ALTER TABLE ? NOCHECK CONSTRAINT all"
declare @catalog nvarchar(250);
declare @schema nvarchar(250);
declare @tbl nvarchar(250);
DECLARE i CURSOR LOCAL FAST_FORWARD FOR select
TABLE_CATALOG,
TABLE_SCHEMA,
TABLE_NAME
from INFORMATION_SCHEMA.TABLES
where
TABLE_TYPE = 'BASE TABLE'
AND TABLE_NAME != 'sysdiagrams'
AND TABLE_NAME != '__RefactorLog'
-- Optional
-- AND (TABLE_SCHEMA = 'dbo')
OPEN i;
FETCH NEXT FROM i INTO @catalog, @schema, @tbl;
WHILE @@FETCH_STATUS = 0
BEGIN
DECLARE @sql NVARCHAR(MAX) = N'DELETE FROM [' + @catalog + '].[' + @schema + '].[' + @tbl + '];'
/* Make sure these are the commands you want to execute before executing */
PRINT 'Executing statement: ' + @sql
--EXECUTE sp_executesql @sql
-- Reset identity counter if one exists
IF ((SELECT OBJECTPROPERTY( OBJECT_ID(@catalog + '.' + @schema + '.' + @tbl), 'TableHasIdentity')) = 1)
BEGIN
SET @sql = N'DBCC CHECKIDENT ([' + @catalog + '.' + @schema + '.' + @tbl + '], RESEED, 0)'
PRINT 'Executing statement: ' + @sql
--EXECUTE sp_executesql @sql
END
FETCH NEXT FROM i INTO @catalog, @schema, @tbl;
END
CLOSE i;
DEALLOCATE i;
-- Re-enable all constraints again
EXEC sp_msforeachtable "ALTER TABLE ? WITH CHECK CHECK CONSTRAINT all"
--Load tables to delete from
SELECT
DISTINCT
' Delete top 1000000 from <DBName>.<schema>.' + c.TABLE_NAME + ' WHERE <Filter Clause Here>' AS query,c.TABLE_NAME AS TableName, IsDeleted=0, '<InsertSomeDescriptorHere>' AS [Source]--,t.TABLE_TYPE, c.*
INTO dbo.AllTablesToDeleteFrom
FROM INFORMATION_SCHEMA.TABLES AS t
INNER JOIN information_schema.columns c ON c.TABLE_NAME = t.TABLE_NAME
WHERE c.COLUMN_NAME = '<column name>'
AND c.TABLE_SCHEMA = 'dbo'
AND c.TABLE_CATALOG = '<DB Name here>'
AND t.TABLE_TYPE='Base table'
--AND t.TABLE_NAME LIKE '<put filter here>'
DECLARE @TableSelect NVARCHAR(1000)= '';
DECLARE @Table NVARCHAR(1000)= '';
DECLARE @IsDeleted INT= 0;
DECLARE @NumRows INT = 1000000;
DECLARE @Source NVARCHAR(50)='';
WHILE ( @IsDeleted = 0 )
BEGIN
--This grabs one table at a time to be deleted from. @TableSelect has the sql to execute. it is important to order by IsDeleted ASC
--because it will pull tables to delete from by those that have a 0=IsDeleted first. Once the loop grabs a table with IsDeleted=1 then this will pop out of loop
SELECT TOP 1
@TableSelect = query,
@IsDeleted = IsDeleted,
@Table = TableName,
@Source=[a].[Source]
FROM dbo.AllTablesToDeleteFrom a
WHERE a.[Source]='SomeDescriptorHere'--use only if needed
ORDER BY a.IsDeleted ASC;--this is required because only those records returned with IsDeleted=0 will run through loop
--SELECT @Table; can add this in to monitor what table is being deleted from
WHILE ( @NumRows = 1000000 )--only delete a million rows at a time?
BEGIN
EXEC sp_executesql @TableSelect;
SET @NumRows = @@ROWCOUNT;
--IF @NumRows = 1000000 --can do something here if needed
--One wants this loop to continue as long as a million rows is deleted. Once < 1 million rows is deleted it pops out of loop
--and grabs next table to delete
-- BEGIN
--SELECT @NumRows;--can add this in to see current number of deleted records for table
INSERT INTO dbo.DeleteFromAllTables
( tableName,
query,
cnt,
[Source]
)
SELECT @Table,
@TableSelect,
@NumRows,
@Source;
-- END;
END;
SET @NumRows = 1000000;
UPDATE a
SET a.IsDeleted = 1
FROM dbo.AllTablesToDeleteFrom a
WHERE a.TableName = @Table;
--flag this as deleted so you can move on to the next table to delete from
END;