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I am trying to enter a query with a field 'Convert (aes_encrypt ())' and also use it as a variable in a subquery.

$string = 'CONVERT(AES_DECRYPT(d.column, "key")USING utf8)';
$query = db_select('demo' 'd');
$query->field('d', $string);

And use this at once as a sub query

$query->condition($string, $subquery, 'IN');

Thank you

0

You want an expression for the selected field:

$query = db_select('demo' 'd');
$query->addExpression($string, 'd');

I'm not sure what you're going for with the sub query bit, if you update the question with the desired SQL it should be straightforward to tell you whether it's possible with a SelectQuery.

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