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MySQLi SELECT

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MySQLi SELECT

MySQLi SELECT is simple if you keep it on paper. Zara uses it for fetch marks by roll in the college DB.

MySQLi SELECT order — meaning → prepared statement → one limit. Dumping ten features helps nobody.

Without MySQLi SELECT, the college DB gets messy and fetch marks by roll is hard to trust.

MySQLi SELECT shows up in the college DB. Name fetch marks by roll, not “a real-world scenario”.

MySQLi SELECT trap — string-concat SQL. Zara loses marks for that every viva.

Place MySQLi SELECT next to nearby PHP work — prepared statement is the link.

Viva for MySQLi SELECT — what it is → prepared statement → the mistake (string-concat SQL).

Exam tip

Board: fetch marks by roll. Dry-run MySQLi SELECT. Name the trap: string-concat SQL.

Example

<?php
// PDO sketch (connection details omitted)
// $pdo = new PDO($dsn, $user, $pass);
// $stmt = $pdo->prepare("SELECT id, name FROM users WHERE id = ?");
// $stmt->execute([1]);
// $row = $stmt->fetch();
$demo = ["id" => 1, "name" => "Asha"];
echo $demo["name"];

MySQLi SELECT — use prepared statements with PDO/MySQLi — never concatenate raw SQL.

Short notes

DefMySQLi SELECT — Zara uses it for fetch marks by roll in the college DB.
RuleMySQLi SELECT → prepared statement.
RememberMySQLi SELECT + a .php page (the college DB).
UseMySQLi SELECT in the college DB (fetch marks by roll).
TrapMySQLi SELECT — string-concat SQL.
ExMySQLi SELECT → fetch marks by roll.

<?php // PDO sketch (connection details omitted) // $pdo = new PDO($dsn, $user, $pass); // $stmt = $pdo->prepare("SELECT id, name FROM users WHERE id = ?"); // $stmt->execute([1]); // $row = $stmt->fetch(); $demo = ["id" => 1, "name" => "Asha"]; echo $demo["name"];

MySQLi SELECT

Example

Short notes

Questions

MySQLi SELECT

Example

Short notes

Questions