SQL query error: Operand should contain 1 column(s)

When I run the sql query below I get an error that says "Operand should contain 1 column(s)"  It is probably something simple I'm new to trying to write two statements together.  Any thoughts?
$data = mysql_query("SELECT username, first_name, last_name, middle_name FROM users WHERE username IN (SELECT * FROM users WHERE state_id=".$session_state_id.") ORDER BY ".$sorter." ASC")

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jbpeakeAsked:
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gamebitsCommented:
You are trying to do a subquery in the same table than the query, not sure what you are trying to achieve, would this not be working

$data = mysql_query("SELECT * FROM users WHERE state_id = '".$session_state_id."' ORDER BY '$sorter' ASC");
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
IN ( SELECT * ...)
is wrong, as SELECT * returns multiple columns.
this would work better:
$data = mysql_query("SELECT username, first_name, last_name, middle_name FROM users WHERE username IN (SELECT username  FROM users WHERE state_id=".$session_state_id.") ORDER BY ".$sorter." ASC");

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Guy Hengel [angelIII / a3]Billing EngineerCommented:
of course, gamebits's query code is more efficient, anyhow :)
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jbpeakeAuthor Commented:
Ughh... painfully obvious when I see what you done.  Thanks.
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gamebitsCommented:
" painfully obvious " believe me I know the feeling, thanks for the points and the grade.
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MySQL Server

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