Apa itu pilih * di php?

Untuk mengembalikan data dari database kita, kita perlu memilihnya dari tabel terlebih dahulu. Kami melakukan ini dengan kueri SELECT FROM

Kita dapat memilih beberapa kolom dari sebuah tabel dengan memisahkan setiap nama kolom dengan koma

 SELECT column1, column2, column3 FROM table

Kita dapat memilih semua kolom dalam tabel dengan simbol asterisk *

" .
         "User Name: " . $row['name'] . "
" .
         "User Email: " . $row['email'] . "

";
}


mysqli_close($conn);
?>

Pada contoh di atas, kami memilih data kami dengan userID lagi. Namun kali ini, itu akan mengambil data kami dalam urutan menaik karena kami tidak menentukan klausanya

mysql_query doesnt support multiple queries, a way round this is to use innodb and transactions

this db class/function will accept an array of arrays of querys, it will auto check every line for affected rows in db, if one is 0 it will rollback and return false, else it will commit and return true, the call to the function is simple and is easy to read etc
----------_

class MySQLDB
{
   private $connection;          // The MySQL database connection

   /* Class constructor */
   function MySQLDB(){
      /* Make connection to database */
      $this->connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS) or die(mysql_error());
      mysql_select_db(DB_NAME, $this->connection) or die(mysql_error());
   }_

   /* Transactions functions */

   function begin(){
      $null = mysql_query("START TRANSACTION", $this->connection);
      return mysql_query("BEGIN", $this->connection);
   }_

   function commit(){
      return mysql_query("COMMIT", $this->connection);
   }_

   function rollback(){
      return mysql_query("ROLLBACK", $this->connection);
   }

   function transaction($q_array){
         $retval = 1;

      $this->begin();

this db class/function will accept an array of arrays of querys, it will auto check every line for affected rows in db, if one is 0 it will rollback and return false, else it will commit and return true, the call to the function is simple and is easy to read etc
----------_0

this db class/function will accept an array of arrays of querys, it will auto check every line for affected rows in db, if one is 0 it will rollback and return false, else it will commit and return true, the call to the function is simple and is easy to read etc
----------_1

this db class/function will accept an array of arrays of querys, it will auto check every line for affected rows in db, if one is 0 it will rollback and return false, else it will commit and return true, the call to the function is simple and is easy to read etc
----------_2

this db class/function will accept an array of arrays of querys, it will auto check every line for affected rows in db, if one is 0 it will rollback and return false, else it will commit and return true, the call to the function is simple and is easy to read etc
----------_3

this db class/function will accept an array of arrays of querys, it will auto check every line for affected rows in db, if one is 0 it will rollback and return false, else it will commit and return true, the call to the function is simple and is easy to read etc
----------_4

this db class/function will accept an array of arrays of querys, it will auto check every line for affected rows in db, if one is 0 it will rollback and return false, else it will commit and return true, the call to the function is simple and is easy to read etc
----------_5

this db class/function will accept an array of arrays of querys, it will auto check every line for affected rows in db, if one is 0 it will rollback and return false, else it will commit and return true, the call to the function is simple and is easy to read etc
----------_6

this db class/function will accept an array of arrays of querys, it will auto check every line for affected rows in db, if one is 0 it will rollback and return false, else it will commit and return true, the call to the function is simple and is easy to read etc
----------_7

this db class/function will accept an array of arrays of querys, it will auto check every line for affected rows in db, if one is 0 it will rollback and return false, else it will commit and return true, the call to the function is simple and is easy to read etc
----------_8

                                    $sql = "SELECT id, firstname, lastname FROM MyGuests";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
        echo "id: " . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "<br>";
    }
} else {
    echo "0 results";
}
$conn->close();

Apa gunanya PILIH *?

Apa artinya PILIH *?

Apa gunanya SELECT * from table?

Apa arti klausa SELECT * di MySQL?