Detach Database: physical file permission

Question

Hi All. I am using windows account to login which is Sysadmin of the SQL server.
when I detach a database, the physical file permission will only have one entry, which is my domain ID with full control.
it using another windows domain account which is also sysadmin would like to attach the database again: FAILED since access denied....
how to avoid this happenn ??

Answer 1

When you detach a DB, the ACLS are reset and the permission is given to the logged in windows account user - the full control on the DB files as expounded here:
https://msdn.microsoft.com/en-us/library/ms189128.aspx/html. You can circumvent your problem by using "EXECUTE AS Domain\[Attaching User]" before detaching the DB using sp_detach_db
(this will retain full CONTROL permission to the attaching user)
However, starting from SQL 2005, you can use a more graceful method of  moving files (on the same server) rather than using the attach/detach as shown below:
Take the DB offline
Move the physical files to the new location
Run the “ALTER DATABASE DBNAME MODIFY FILE (NAME  = logicalfilename, FILENAME =  physicalfilepath” command to provide the new path
Bring the DB online
However, if you are moving the DB to another server, then backup/restore will be best (you can use compression (SQL 2008 R2 standard edition or higher supports it) and this will move much faster than uncompressed MDF and LDF files
Satish Kartan www.sqlfood.com