The list below is definitely not inclusive.
Bad Hair Days & Nightmares happen when your Team uses a Spreadsheet for a Task that should have been done with a Database.
You spent big money, to buy the wrong tool, wasted everyone's time & corrupted your Data.  Ungood.
Nightmare #1  1. Open a spreadsheet   2. Select some columns   3. Sort, then Save   4. Realize that you did not Select all          of the columns before you sorted   5. A bad day begins.
Nightmare #3   1. Try to have 4 people work on the      same Spreadsheet at the same time.   2. Give up and proceed to Nightmare #4.
Nightmare #2   1. Create a suitable Spreadsheet   2. Distribute to 22 others in - or - out - of your office   3. Ask them to 'fix' any errors   4. Retrieve and try to Consolidate into          1 'corrected file'.  5. Develop a persistent facial tic.
Nightmare #4   1. Pay for 3 more Excel licenses   2. Sigh deeply   3. Proceed to Nightmares #1, #2 and #3.
Use the Right Tool
The error shown on the image below is not possible when you use a database.
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