my apologies if you've seen it before

Yesterday,
All those backups seemed a waste of pay.
Now my database has gone away.
Oh, I believe in yesterday.

Suddenly,
There's not half the files there used to be,
And there's a millstone hanging over me
The system crashed so suddenly.

I pushed something wrong
What it was I could not say.

Now all my data's gone
and I long for yesterday-ay-ay.

Yesterday,
The need for backups seemed so far away.
I knew my data was all here to stay,
Now I believe in yesterday.

(author unknown)