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create uique index stu_cou_index on student_info.results (student_id, course_id);
show index from student_info.results;

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mysql> c:\wamp\www\index.sql
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      show warnings disabled.
      error:
      unknown command '\i'
      ->

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mysql > c:/wamp/www/index.sql

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create unique index stu_cou_index on student_info.results (student_id, course_id);

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mysql> c:\wamp\www\index.sql
      show warnings disabled.
      show warnings disabled.
      error:
      unknown command '\i'
      ->

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$sql = "select count(*) from admin";
$result = mysql_query($sql);
$num=mysql_num_rows($result);
echo $num;
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