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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[–] agilob 47 points 1 year ago* (last edited 1 year ago) (6 children)

All (doesn't seem like MsSQL supports it, I thought that's a pretty basic feature) databases have special configuration that warn or throw error when you try to UPDATE or DELETE without WHERE. Use it.

[–] [email protected] 10 points 1 year ago (5 children)

I tried to find this setting for postgres and Ms SQLserver, the two databases I interact with. I wasn't able to find any settings to that effect, do you happen to know them?

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