Drop all the tables, stored procedures, triggers, constraints and all the dependencies in one sql statement

This is what I have tried:

SELECT 'DROP TABLE [' + SCHEMA_NAME(schema_id) + '].[' + name + ']' FROM sys.tables

What ever the output it will print, just copy all and paste in new query and press execute.
This will delete all tables.

Try this

Select 'ALTER TABLE ' + Table_Name +' drop constraint ' + Constraint_Name from Information_Schema.CONSTRAINT_TABLE_USAGE

Select 'drop Procedure ' + specific_name from Information_Schema.Routines where specific_name not like 'sp%' AND specific_name not like 'fn_%'

Select 'drop View ' + table_name from Information_Schema.tables where Table_Type = 'VIEW'

SELECT 'DROP TRIGGER ' + name FROM sysobjects WHERE type = 'tr'

Select 'drop table ' + table_name from Information_Schema.tables where Table_Type = 'BASE TABLE'

In addition to @Ivan's answer, types all need to be included

/* Drop all Types */
DECLARE @name VARCHAR(128)
DECLARE @SQL VARCHAR(254)

SELECT @name = (SELECT TOP 1 [name] FROM sys.types where is_user_defined = 1 ORDER BY [name])

WHILE @name IS NOT NULL
BEGIN
SELECT @SQL = 'DROP TYPE [dbo].[' + RTRIM(@name) +']'
EXEC (@SQL)
PRINT 'Dropped Type: ' + @name
SELECT @name = (SELECT TOP 1 [name] FROM sys.types where is_user_defined = 1 AND [name] > @name ORDER BY [name])
END
GO

I tried some of the script here, but they didn't work for me, as I have my tables in schemas. So I put together the following. Note that this script takes a list of schemas, and drops then in sequence. You need to make sure that you have a complete ordering in your schemas. If there are any circular dependencies, then it will fail.




PRINT 'Dropping whole database'
GO

------------------------------------------
-- Drop constraints
------------------------------------------
DECLARE @Sql NVARCHAR(500) DECLARE @Cursor CURSOR

SET @Cursor = CURSOR FAST_FORWARD FOR
SELECT DISTINCT sql = 'ALTER TABLE ['+tc2.CONSTRAINT_SCHEMA+'].[' + tc2.TABLE_NAME + '] DROP [' + rc1.CONSTRAINT_NAME + ']'
FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS rc1
LEFT JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc2 ON tc2.CONSTRAINT_NAME =rc1.CONSTRAINT_NAME

OPEN @Cursor FETCH NEXT FROM @Cursor INTO @Sql

WHILE (@@FETCH_STATUS = 0)
BEGIN
PRINT @Sql
Exec (@Sql)
FETCH NEXT FROM @Cursor INTO @Sql
END

CLOSE @Cursor DEALLOCATE @Cursor
GO


------------------------------------------
-- Drop views
------------------------------------------

DECLARE @sql VARCHAR(MAX) = ''
, @crlf VARCHAR(2) = CHAR(13) + CHAR(10) ;

SELECT @sql = @sql + 'DROP VIEW ' + QUOTENAME(SCHEMA_NAME(schema_id)) + '.' + QUOTENAME(v.name) +';' + @crlf
FROM sys.views v

PRINT @sql;
EXEC(@sql);
GO
------------------------------------------
-- Drop procs
------------------------------------------
PRINT 'Dropping all procs ...'
GO

DECLARE @sql VARCHAR(MAX) = ''
, @crlf VARCHAR(2) = CHAR(13) + CHAR(10) ;

SELECT @sql = @sql + 'DROP PROC ' + QUOTENAME(SCHEMA_NAME(p.schema_id)) + '.' + QUOTENAME(p.name) +';' + @crlf
FROM [sys].[procedures] p

PRINT @sql;
EXEC(@sql);
GO

------------------------------------------
-- Drop tables
------------------------------------------
PRINT 'Dropping all tables ...'
GO
EXEC sp_MSForEachTable 'DROP TABLE ?'
GO

------------------------------------------
-- Drop sequences
------------------------------------------

PRINT 'Dropping all sequences ...'
GO
DECLARE @DropSeqSql varchar(1024)
DECLARE DropSeqCursor CURSOR FOR
SELECT DISTINCT 'DROP SEQUENCE ' + s.SEQUENCE_SCHEMA + '.' + s.SEQUENCE_NAME
FROM INFORMATION_SCHEMA.SEQUENCES s

OPEN DropSeqCursor

FETCH NEXT FROM DropSeqCursor INTO @DropSeqSql

WHILE ( @@FETCH_STATUS <> -1 )
BEGIN
PRINT @DropSeqSql
EXECUTE( @DropSeqSql )
FETCH NEXT FROM DropSeqCursor INTO @DropSeqSql
END

CLOSE DropSeqCursor
DEALLOCATE DropSeqCursor
GO

------------------------------------------
-- Drop Schemas
------------------------------------------


DECLARE @schemas as varchar(1000) = 'StaticData,Ird,DataImport,Collateral,Report,Cds,CommonTrade,MarketData,TypeCode'
DECLARE @schemasXml as xml = cast(('<schema>'+replace(@schemas,',' ,'</schema><schema>')+'</schema>') as xml)

DECLARE @Sql NVARCHAR(500) DECLARE @Cursor CURSOR

SET @Cursor = CURSOR FAST_FORWARD FOR
SELECT sql = 'DROP SCHEMA ['+schemaName+']' FROM
(SELECT CAST(T.schemaName.query('text()') as VARCHAR(200)) as schemaName FROM @schemasXml.nodes('/schema') T(schemaName)) as X
JOIN information_schema.schemata S on S.schema_name = X.schemaName

OPEN @Cursor FETCH NEXT FROM @Cursor INTO @Sql

WHILE (@@FETCH_STATUS = 0)
BEGIN
PRINT @Sql
Exec (@Sql)
FETCH NEXT FROM @Cursor INTO @Sql
END

CLOSE @Cursor DEALLOCATE @Cursor
GO

There is no single statement that can be used to achieve this aim.

You could of course create yourself a `stored procedure` that you could use to perform these various administrative tasks.

You could then execute the procedure using this single statement.

Exec sp_CleanDatabases @DatabaseName='DBname'

DECLARE @name VARCHAR(255)
DECLARE @type VARCHAR(10)
DECLARE @prefix VARCHAR(255)
DECLARE @sql VARCHAR(255)

DECLARE curs CURSOR FOR
SELECT [name], xtype
FROM sysobjects
WHERE xtype IN ('U', 'P', 'FN', 'IF', 'TF', 'V', 'TR') -- Configuration point 1
ORDER BY name

OPEN curs
FETCH NEXT FROM curs INTO @name, @type

WHILE @@FETCH_STATUS = 0
BEGIN
-- Configuration point 2
SET @prefix = CASE @type
WHEN 'U' THEN 'DROP TABLE'
WHEN 'P' THEN 'DROP PROCEDURE'
WHEN 'FN' THEN 'DROP FUNCTION'
WHEN 'IF' THEN 'DROP FUNCTION'
WHEN 'TF' THEN 'DROP FUNCTION'
WHEN 'V' THEN 'DROP VIEW'
WHEN 'TR' THEN 'DROP TRIGGER'
END

SET @sql = @prefix + ' ' + @name
PRINT @sql
EXEC(@sql)
FETCH NEXT FROM curs INTO @name, @type
END

CLOSE curs
DEALLOCATE curs

The best thing to do it is "**Generate scripts for Drop**"

Select **Database** -> **Right Click** -> **Tasks** -> **Generate Scripts** - will open **wizard** for generating scripts

after choosing objects in set Scripting option click **Advanced** Button


- -> Set option 'Script to create' to true (want to create)
- -> Set option '**Script to Drop**' to true (want to drop)
- -> Select the Check box to select objects wish to create script
- -> Select the choice to write script (File, New window, Clipboard)
- It includes dependent objects by default.(and will drop constraint at first)

Execute the script

This way we can customize our script.

**You have to disable all `triggers` and `constraints` first.**

EXEC sp_MSforeachtable @command1="ALTER TABLE ? NOCHECK CONSTRAINT ALL"

EXEC sp_MSforeachtable @command1="ALTER TABLE ? DISABLE TRIGGER ALL"


**After that you can generate the scripts for deleting the objects as**

SELECT 'Drop Table '+name FROM sys.tables WHERE type='U';

SELECT 'Drop Procedure '+name FROM sys.procedures WHERE type='P';

**Execute the statements generated.**

To remove all objects in oracle :

1) Dynamic

DECLARE
CURSOR IX IS
SELECT * FROM ALL_OBJECTS WHERE OBJECT_TYPE ='TABLE'
AND OWNER='SCHEMA_NAME';
CURSOR IY IS
SELECT * FROM ALL_OBJECTS WHERE OBJECT_TYPE
IN ('SEQUENCE',
'PROCEDURE',
'PACKAGE',
'FUNCTION',
'VIEW') AND OWNER='SCHEMA_NAME';
CURSOR IZ IS
SELECT * FROM ALL_OBJECTS WHERE OBJECT_TYPE IN ('TYPE') AND OWNER='SCHEMA_NAME';
BEGIN
FOR X IN IX LOOP
EXECUTE IMMEDIATE('DROP '||X.OBJECT_TYPE||' '||X.OBJECT_NAME|| ' CASCADE CONSTRAINT');
END LOOP;
FOR Y IN IY LOOP
EXECUTE IMMEDIATE('DROP '||Y.OBJECT_TYPE||' '||Y.OBJECT_NAME);
END LOOP;
FOR Z IN IZ LOOP
EXECUTE IMMEDIATE('DROP '||Z.OBJECT_TYPE||' '||Z.OBJECT_NAME||' FORCE ');
END LOOP;
END;
/


2)Static




SELECT 'DROP TABLE "' || TABLE_NAME || '" CASCADE CONSTRAINTS;' FROM user_tables
union ALL
select 'drop '||object_type||' '|| object_name || ';' from user_objects
where object_type in ('VIEW','PACKAGE','SEQUENCE', 'PROCEDURE', 'FUNCTION')
union ALL
SELECT 'drop '
||object_type
||' '
|| object_name
|| ' force;'
FROM user_objects
WHERE object_type IN ('TYPE');

I'm using this script by Adam Anderson, updated to support objects in other schemas than dbo.

declare @n char(1)
set @n = char(10)

declare @stmt nvarchar(max)

-- procedures
select @stmt = isnull( @stmt + @n, '' ) +
'drop procedure [' + schema_name(schema_id) + '].[' + name + ']'
from sys.procedures


-- check constraints
select @stmt = isnull( @stmt + @n, '' ) +
'alter table [' + schema_name(schema_id) + '].[' + object_name( parent_object_id ) + '] drop constraint [' + name + ']'
from sys.check_constraints

-- functions
select @stmt = isnull( @stmt + @n, '' ) +
'drop function [' + schema_name(schema_id) + '].[' + name + ']'
from sys.objects
where type in ( 'FN', 'IF', 'TF' )

-- views
select @stmt = isnull( @stmt + @n, '' ) +
'drop view [' + schema_name(schema_id) + '].[' + name + ']'
from sys.views

-- foreign keys
select @stmt = isnull( @stmt + @n, '' ) +
'alter table [' + schema_name(schema_id) + '].[' + object_name( parent_object_id ) + '] drop constraint [' + name + ']'
from sys.foreign_keys

-- tables
select @stmt = isnull( @stmt + @n, '' ) +
'drop table [' + schema_name(schema_id) + '].[' + name + ']'
from sys.tables

-- user defined types
select @stmt = isnull( @stmt + @n, '' ) +
'drop type [' + schema_name(schema_id) + '].[' + name + ']'
from sys.types
where is_user_defined = 1


exec sp_executesql @stmt

[Source: an Adam Anderson blog post](

[To see links please register here]

)