-- Letörli az összes létező adatbázis objektumot (tábla, constraintek, indexek, tárolt eljárások, viewk), az adatbázis törlése nélkül

/* FK-k törlése */
DECLARE @sql nvarchar(max) = '';

SELECT @sql += 'ALTER TABLE [' + TABLE_NAME + '] DROP CONSTRAINT ' + CONSTRAINT_NAME + char(13) + char(10) 
FROM INFORMATION_SCHEMA.CONSTRAINT_TABLE_USAGE
WHERE CONSTRAINT_NAME like 'FK[_]%' AND TABLE_SCHEMA != 'sys'

--SELECT @sql
EXEC sp_executesql @sql
GO

/*SP-k és FN-ek törlése */
DECLARE @sql nvarchar(max) = '';

SELECT @sql += 'DROP ' + ROUTINE_TYPE + ' [' + ROUTINE_SCHEMA + '].[' + ROUTINE_NAME + ']' + char(13) + char(10) 
FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_SCHEMA != 'sys'

--SELECT @sql
EXEC sp_executesql @sql
GO

/*TABLE és VIEW törlések*/
DECLARE @sql nvarchar(max) = '';

SELECT @sql += 'DROP ' + CASE TABLE_TYPE WHEN 'BASE TABLE' THEN 'TABLE [' WHEN 'VIEW' THEN 'VIEW [' ELSE NULL END + TABLE_SCHEMA + '].[' + TABLE_NAME +']'  + char(13) + char(10) 
FROM INFORMATION_SCHEMA.TABLES 
WHERE TABLE_SCHEMA != 'sys'

--SELECT @sql
EXEC sp_executesql @sql
GO

/*LOGINok törlése*/
DECLARE @sql nvarchar(max) = '';

SELECT @sql += 'DROP LOGIN [' + REPLACE([SCHEMA_NAME], '_schema', '_user]') + char(13) + char(10) 
FROM INFORMATION_SCHEMA.SCHEMATA
WHERE SCHEMA_OWNER = 'dbo' AND [SCHEMA_NAME] <> 'dbo' AND [SCHEMA_NAME] <> 'sys'

SELECT @sql
EXEC sp_executesql @sql
GO

/*USERek és ROLE-ok törlése*/
/*DECLARE @sql nvarchar(max) = '';

SELECT @sql += 'DROP ' + CASE [type] WHEN 'S' THEN ' USER [' WHEN 'R' THEN 'ROLE [' ELSE NULL END + [name] + ']' + char(13) + char(10) 
FROM sys.database_principals
WHERE principal_id > 4 AND is_fixed_role = 0 */

--SELECT @sql
--EXEC sp_executesql @sql
GO

/*SCHEMA törlése*/
DECLARE @sql nvarchar(max) = '';

SELECT @sql += 'DROP SCHEMA [' + [SCHEMA_NAME] + ']' + char(13) + char(10) 
FROM INFORMATION_SCHEMA.SCHEMATA
WHERE SCHEMA_OWNER = 'dbo' AND [SCHEMA_NAME] <> 'dbo' AND [schema_name] != 'sys'

--SELECT @sql
EXEC sp_executesql @sql
GO