Giving all permissions to all users for a database in SQL Server
You want local Windows users to have the same permissions as the database owner of a specific database? How about:


Manually create logins for each Windows account:


-- repeat this whole block for each user account

USE [master];
GO
CREATE LOGIN [Domain\Account] FROM WINDOWS;
GO

  -- repeat just this portion for each database that account should belong to

  USE [your_database];
  GO
  CREATE USER [Domain\Account] FROM LOGIN [Domain\Account];
  GO



Add the users to the dbo role of each database to which you've added a user account above, using dynamic SQL (uncomment the EXEC line when you think it looks right):


DECLARE @sql NVARCHAR(MAX);
SET @sql = N'';

SELECT @sql = @sql + N'
  EXEC sp_addrolemember N''db_owner'', N''' + name + ''';'
FROM sys.database_principals
WHERE principal_id BETWEEN 5 AND 16383
AND [type] IN ('U', 'S');

PRINT @sql;
--EXEC sp_executesql @sql;