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Asked: 2026-06-13T15:23:18+00:00

I have this task from school, and I am confuse and lost on how

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I have this task from school, and I am confuse and lost on how I got to do this.
So basically I have to create 2 tables to the database but I have to created from php.

I have created the first table, but not the second one for some reason.
And then, I have to populate first and second tables with 10 and 20 sample records respectively, populate, does it mean like adding more fake users? if so is it like the code shown below?

*I got error on the populating second part as well

Thank you so much for the help.

<?php
        $host = "host";
        $user = "me";
        $pswd = "password";
        $dbnm = "db";

        $conn = @mysqli_connect($host, $user, $pswd, $dbnm);
        if (!$conn)
            die ("<p>Couldn't connect to the server!<p>");

        $selectData = @mysqli_select_db ($conn, $dbnm);
        if(!$selectData)
        {
            die ("<p>Database Not Selected</p>");
        }

        //1st table
            $sql =  "CREATE TABLE IF NOT EXISTS  `friends`  
          (  
          `friend_id` INT NOT NULL auto_increment,   
          `friend_email` VARCHAR(20) NOT NULL,  
          `password` VARCHAR(20) NOT NULL,  
          `profile_name` VARCHAR(30) NOT NULL,  
          `date_started` DATE NOT NULL,  
          `num_of_friends` INT unsigned,  
          PRIMARY KEY (`friend_id`)  
          )";

        //2nd table
          $sqlMyfriends = "CREATE TABLE `myfriends`
          (  
          `friend_id1` INT NOT NULL,   
          `friend_id2` INT NOT NULL,
          )";


        $query_result1 = @mysqli_query($conn, $sql);
        $query_result2 = @mysqli_query($conn, $sqlMyfriends);

        //populating 1st table
        $sqlSt3="INSERT INTO friends (friend_id, friend_email, password, profile_name, date_started, num_of_friends) 
                VALUES('NULL','email@email.com','123','abc','2012-10-25', 5)";
        $queryResult3 = @mysqli_query($dbConnect,$sqlSt3)


        //populating 2nd table
        $sqlSt13="INSERT INTO myfriends VALUES(1,2)";
        $queryResult13=@mysqli_query($dbConnect,$sqlSt13);


        mysqli_close($conn);

    ?>
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1 Answer

  1. Editorial Team

    The others have addressed one of your issues, so this is in relation to not being able to add values to your tables (populate). Your connection link is $conn –

    $conn = @mysqli_connect($host, $user, $pswd, $dbnm);
ie.
   $query_result1 = @mysqli_query($conn, $sql);

    but when you are adding your values to the tables, you changed your connection link to $dbConnect

    ...
$queryResult3 = @mysqli_query($dbConnect,$sqlSt3)
...
$queryResult13=@mysqli_query($dbConnect,$sqlSt13);

    To insert multiple values into your table you could add a comma and additional parentheses ,() –

        //populating 2nd table
    $sqlSt13="INSERT INTO myfriends VALUES(1,2),(2,3),(3,1)";
    $queryResult13=@mysqli_query($conn,$sqlSt13);

    Or you could use mysqli_multi_query, and list each one-

        //populating 2nd table
    $sqlSt13  ="INSERT INTO myfriends VALUES (1,2);";
    $sqlSt13 .="INSERT INTO myfriends VALUES (2,3);";
    $sqlSt13 .="INSERT INTO myfriends VALUES (3,1);";
    $queryResult13=@mysqli_query($conn,$sqlSt13);

    see the manual for mysqli_multi_query – php.net/manual/en/mysqli.multi-query.php

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