this post was submitted on 11 Oct 2023

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Programming

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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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[–] [email protected] 8 points 1 year ago (1 children)

I know it's too late to be helpful now, but I always write the WHERE first, because you are not the first person to have done this...

[–] [email protected] 1 points 1 year ago

This was the first thing I was taught when writing queries.

Roll the statements uphill so the last thing you do is the select.