SQL and friends

I woke up at 6am after a restful 8 hours of sleep. Read for a bit, installed SQL Express on my laptop, ate a bowl of Raisin Bran, met up with a friend for coffee, called another friend, then came home to start the exercises in my Exam Reference book. The first exercise went well - it only used tempdb. The second exercise used a database called WideWorldImporters. I assumed it was a sample database that one can download through some Microsoft site. Found it!


Yep. Downloaded WideWorldImporters-Full.bak and set to work restoring the backup to my machine. I'd done that at work plenty of times. Heck, I can just use the GUI if I'm feeling lazy. GUI it is!!!

The operating system returned the error '3(The system cannot find the path specified.)' while attempting 'CreateDirectoryW' on '\?\D:\Program Files\Microsoft SQL Server\MSSQL15.SQLEXPRESS\MSSQL\DATA\WideWorldImporters_2.$FSLOG'.

Yikes! But, sure, \?\ doesn't start any drives I know of on my computer, so I should double check what the options are for the paths for the data and the logs.  It's listing  E:\Log\WideWorldImporters.ldf as the path for the logs, but I don't have an E drive, so I change that and retry. 

The operating system returned the error '3(The system cannot find the path specified.)' while attempting 'RemoveContainer' on 'D:\Program Files\Microsoft SQL Server\MSSQL15.SQLEXPRESS\MSSQL\DATA\WideWorldImporters_2.'.

...What... what the heck? It can't find the path? That is the path. I only have two drives. One holds the application.The other holds the data and transaction logs (if I had more drives, I would split the data and logs into different drives, but no option here). I look further at the GUI to see if it's putting something in the incorrect path. I open up Windows Explorer to see what files I have in my DATA folder and notice that I don't actually have an mdf (data) file! How do I have an ndf (user data) and ldf (log) and no mdf file? I head back to SQL Server Management Studio and find that WideWorldImporters database is a thing but stuck in a restoring state. I just decide to get rid of it and start fresh. I attempt to delete the database.

Drop failed for Database 'WideWorldImporters'.  (Microsoft.SqlServer.Smo)

SQL Server detected a logical consistency-based I/O error: incorrect pageid (expected 1:9; actual 0:0). It occurred during a read of page (1:9) in database ID 5 at offset 0x00000000012000 in file 'D:\Program Files\Microsoft SQL Server\MSSQL15.SQLEXPRESS\MSSQL\DATA\WideWorldImporters.mdf'.  Additional messages in the SQL Server error log or operating system error log may provide more detail. This is a severe error condition that threatens database integrity and must be corrected immediately. Complete a full database consistency check (DBCC CHECKDB).

Are you kidding me? I can't even drop it? Disappointingly, hours later now that I'm writing this, I've forgotten how I eventually dropped it. After it was gone, I did more searching. Google/StackOverflow/mssqltips seemed to agree it was necessary to move the file when you restore it. That could be a possibility - after all, I don't see my mdf file, and it's gotta be here in the bak file somewhere, right? I stumble upon this page: https://www.mssqltips.com/sqlservertip/4394/download-and-install-sql-server-2016-sample-databases-wideworldimporters-and-wideworldimportersdw/

And that has this code:

USE [master]
RESTORE DATABASE [WideWorldImportersDW] FROM  DISK = N'R:\SQLbackups\WideWorldImportersDW-Full.bak' 
WITH  FILE = 1,  
MOVE N'WWI_Primary' TO N'F:\SQL_Data\WideWorldImportersDW.mdf',  
MOVE N'WWI_UserData' TO N'F:\SQL_Data\WideWorldImportersDW_UserData.ndf',  
MOVE N'WWI_Log' TO N'L:\SQL_Logs\SQL2016\WideWorldImportersDW.ldf', 
MOVE N'WWIDW_InMemory_Data_1' TO N'F:\SQL_Data\WideWorldImportersDW_InMemory_Data_1',  

I replace the paths here to paths that reflect my data drive, and success!! I have a working database! Two hours after I start a 'simple 2 minute restore', I can move onto the second exercise in the book, on page 7. Whew!


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