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Editorial Team
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Asked: 2026-06-18T16:35:15+00:00

I’m trying to do something very basic but can’t quite figure this one out.

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I’m trying to do something very basic but can’t quite figure this one out. I’m using PHP and MySQLi (OOP) rather than MySQL. I could use multiple single select statements then put the count from each number into a variable, but I think it’s inefficient.

Okay, there are a few tables;

TABLE NAME: UCC_STAFF
id
email
username
password
status

TABLE NAME: UCC_TEMP_STAFF
id
email
username
password
status

TABLE NAME: UCC_TEMP_STUDENTS
id
email
username
password
status

TABLE NAME: UCC_VISITORS
id
email
username
password
status

What I’m trying to do is count the number of rows from each table, each row represents a user. As I’ve explained; It’s easy enough to do with one table but I’d like to combine results with a single request into a an array rather than multiple statements into multiple variables.

An example of the desired result would be;

$a = results('UCC_STAFF' => '35',
            'UCC_TEMP_STAFF' => '12',
            'UCC_STUDENTS' => '543',
            'UCC_VISITORS'  => '6',);

What I would imagine this to look like would be;

$db_host = "dbhost";
$db_username = "username"; 
$db_pass = "password";
$db_name = "dbname";

$mysqli = new mysqli("$db_host", "$db_username", "$db_pass", "$db_name");

if ($mysqli->connect_errno) {
    printf("Connect failed: %s\n", $mysqli->connect_error);
    exit();
}

$query  = "SELECT * FROM UCC_STAFF;";
$query .= "SELECT * FROM UCC_TEMP_STAFF;";
$query .= "SELECT * FROM UCC_STUDENTS;";
$query .= "SELECT * FROM UCC_VISITORS";

if ($mysqli->multi_query($query)) {

// Results into $results
// How do I do this, what goes here?    

    }

// Print Array
print_r ($results);
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1 Answer

  1. Editorial Team

    i think you looking for something like this with UNION

     $query  =(  (SELECT CONCAT('UCC_STAFF', '')as UCC_STAFF ,count(*)as count from UCC_STAFF )

              UNION ALL
              (SELECT CONCAT('UCC_TEMP_STAFF', '')as UCC_TEMP_STAFF ,count(*) from UCC_TEMP_STAFF )

              UNION ALL
              (SELECT CONCAT('UCC_TEMP_STUDENTS', '')as UCC_TEMP_STUDENTS ,count(*) from  UCC_TEMP_STUDENTS )

              UNION ALL
              (SELECT CONCAT('UCC_VISITORS', '')as UCC_VISITORS ,count(*) from UCC_VISITORS ) );

    DEMO SQLFIDDLE HERE

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