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PHP & MySQL

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Mar 23.2008

Not sure whether to put this in PHP or MySQL forums.

I want to select an entry from a table where it’s value is NOT LIKE any values in the result of a previous query.

How do I go about this?

For example, I run a query to find the ID’s of all items that are in a history table. I then want to run a query that finds a single entry from another table, WHERE the ID is different from all of the results in the history table.

Thanks, TK

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@ss1289Mar 23.2008 — Get the array of your first results then use implode()
[code=php]$comma_separated = implode(",", $array);[/code]
This will put them into a string called $comma_seperated and each entry will be separated by a column.

Then run a query like.
[code=php]SELECT ... FROM ... WHERE Id NOT IN ($comma_separated);[/code]

That's an idea.
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@AnotherMuggleauthorMar 23.2008 — Nice one.

Much appreciated ?
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@padreMar 24.2008 — you can do it in one sql query

eg, select all users that have never left a comment

SELECT * FROM user WHERE userId NOT IN (SELECT userId FROM comment)
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@AnotherMuggleauthorMar 24.2008 — you can do it in one sql query

eg, select all users that have never left a comment

SELECT * FROM user WHERE userId NOT IN (SELECT userId FROM comment)[/QUOTE]
Looks like this would also do the job ?
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