Slip no. 9. Consider the
following entities and their relationship.
Student ( stud_id, name,
class)
Competition(c_no,c_name, type)
a) Relationship between
student and competition In many-many with attributes rank and year.
b) Create a RDB in 3NF for
above and solve the following.
c) Using above database write
a script in PHP to accept a competition from user and display information of
student who has secured 1st rank in that competition.
HTML file
:
<html>
<body>
<form action=slip9_2.php>
Enter Compitition Name :<input
type=text name=a id=a><br>
<input type=submit
value="DISPLAY" >
</form>
</body>
</html>
PHP file :
<?php
$con_string="host=localhost
dbname=bcs_slips port=5432 user=postgres
password=nrc";
$con=pg_connect($con_string);
$a=$_GET['a'];
echo $a;
echo "</br>";
$q="select
student.stud_id,sname,class from student,competition,stud_copm where cnme='$a' and
student.stud_id=stud_copm.stud_id and competition.c_no=stud_copm.c_no;";
$rs=pg_query($con,$q)
or die("Cannot Execute query");
while($row=pg_fetch_row($rs))
echo
"$row[0] $row[1] $row[2]\n</br>";
pg_close();
?>
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