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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 9 months ago* (last edited 9 months ago) by drekly@lemmy.world to c/programming@programming.dev

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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@programming.dev 44 points 9 months ago* (last edited 9 months ago)

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.

[-] flying_gel@lemmy.world 8 points 9 months ago

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?

[-] RonSijm@programming.dev 5 points 9 months ago

for postgres and Ms SQLserver

It's not really a SQL Language feature, more an IDE feature. So to tell you where the settings are, we'd have to know which IDE you're using.

For example, in DataGrip (which I think you can use both for postgres and MSSQL), there's "Show warning before running potentially unsafe queries"

If you forgot to put the WHERE clause in DELETE and UPDATE statements, DataGrip displays a notification to remind you about that. If you omitted the WHERE clause intentionally, you can execute current statements as you planned.

[-] flying_gel@lemmy.world 2 points 9 months ago

That would be SQL management studio and psql on the command line.

The best I could find was some plugins for SQL management studio (ssmsboost) and disable automatic commits for psql.

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this post was submitted on 11 Oct 2023

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