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MySQL mode

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I'm having trouble setting and retreiving the MySQL mode. Based on what I read at mysql.org, this is what I wrote:

mysql_connect(blah blah blah);
mysql_select_db(blah blah blah);

mysql_query("SET GLOBAL sql_mode='strict_all_tables'");

$result = mysql_query("SELECT @@global.sql_mode;"); //also tried without semicolon, no difference
$row = mysql_fetch_array($result);
I'm getting "Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in page.html"

Also, what is the difference between GLOBAL and SESSION. If I'm gonna be setting the mode after each connect, which one should I go with? Or does global eliminate the need to set the mode after every connect?

Any help would be appreciated. Thanks much.

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