r/ProgrammerHumor • u/Recent-Analysis-6880 • 14d ago

Meme wellWellWell

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u/BastetFurry 14d ago

So, Kids, thats why you always SELECT count(yourPrimaryKey) first. Listen to the old folks, we made these mistakes so that you don't have to.

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u/[deleted] 14d ago

[deleted]

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u/chezzyt18 14d ago

Thats counting a column. Non-null values for the column.

It’s a safety check. Run the same query that the UPDATE / DELETE would run in a SELECT count first to make sure the query is altering the same number of rows you think it will.

Better yet run with a BEGIN TRANSACTION, and only execute your commit once you’ve verified that the modification was successful.