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I accidentally removed the WHERE clause from my SQL query in a personal tool. Every row is now the same. I overwrote 206,000+ rows. I have no backup, I am stupid. (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/programming

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"UPDATE table_name SET w = $1, x = $2, z = $4 WHERE y = $3 RETURNING *",

does not do the same as

"UPDATE table_name SET w = $1, x = $2, y = $3, z = $4 RETURNING *",

It's 2 am and my mind blanked out the WHERE, and just wanted the numbers neatly in order of 1234.

idiot.

FML.

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[–] sjpwarren 4 points 1 year ago

I would run a SELECT with a WHERE clause to see the data I was about to remove to make sure it looked right. Then I would make the delete and Copy and Paste (can you see where this is going? - pun intended) the WHERE clause from the Select into the Delete and run it. But I didn't. This was a production database. It got so hot all of a sudden as I realised what I had done! Lucky we only lost a few hours work.

I am sorry for your loss